The Philadelphia Athletics of the American League ended the season with a record of 81 wins and 70 losses, finishing fifth in the AL. Connie Mack served as manager.
| Date | Game | Res | Home | Road | Record | |
| April 14, 1904 | Philadelphia Athletics 8 at Washington Senators 3 | W | 0-0 | 1-0 | 1-0 | |
| April 15, 1904 | Philadelphia Athletics 6 at Washington Senators 6 | | 0-0 | 1-0 | 1-0 | |
| April 16, 1904 | Philadelphia Athletics 12 at Washington Senators 2 | W | 0-0 | 2-0 | 2-0 | |
| April 18, 1904 | Philadelphia Athletics 5 at New York Highlanders 1 | W | 0-0 | 3-0 | 3-0 | |
| April 19, 1904 | Philadelphia Athletics 4 at New York Highlanders 5 | L | 0-0 | 3-1 | 3-1 | |
| April 21, 1904 | New York Highlanders 2 at Philadelphia Athletics 3 | W | 1-0 | 3-1 | 4-1 | |
| April 22, 1904 | Boston Americans 3 at Philadelphia Athletics 1 | L | 1-1 | 3-1 | 4-2 | |
| April 23, 1904 | Boston Americans 3 at Philadelphia Athletics 1 | L | 1-2 | 3-1 | 4-3 | |
| April 25, 1904 | Boston Americans 0 at Philadelphia Athletics 2 | W | 2-2 | 3-1 | 5-3 | |
| April 26, 1904 | Boston Americans 2 at Philadelphia Athletics 1 | L | 2-3 | 3-1 | 5-4 | |
| April 30, 1904 | New York Highlanders 2 at Philadelphia Athletics 6 | W | 3-3 | 3-1 | 6-4 | |
| May 2, 1904 | Philadelphia Athletics 3 at Boston Americans 0 | W | 3-3 | 4-1 | 7-4 | |
| May 3, 1904 | Philadelphia Athletics 2 at Boston Americans 4 | L | 3-3 | 4-2 | 7-5 | |
| May 4, 1904 | Philadelphia Athletics 2 at Boston Americans 3 | L | 3-3 | 4-3 | 7-6 | |
| May 5, 1904 | Philadelphia Athletics 0 at Boston Americans 3 | L | 3-3 | 4-4 | 7-7 | |
| May 6, 1904 | Washington Senators 6 at Philadelphia Athletics 16 | W | 4-3 | 4-4 | 8-7 | |
| May 7, 1904 | Washington Senators 4 at Philadelphia Athletics 11 | W | 5-3 | 4-4 | 9-7 | |
| May 9, 1904 | Washington Senators 3 at Philadelphia Athletics 6 | W | 6-3 | 4-4 | 10-7 | |
| May 11, 1904 | Chicago White Sox 5 at Philadelphia Athletics 6 | W | 7-3 | 4-4 | 11-7 | |
| May 12, 1904 | Chicago White Sox 3 at Philadelphia Athletics 9 | W | 8-3 | 4-4 | 12-7 | |
| May 13, 1904 | Chicago White Sox 3 at Philadelphia Athletics 2 | L | 8-4 | 4-4 | 12-8 | |
| May 14, 1904 | Chicago White Sox 1 at Philadelphia Athletics 2 | W | 9-4 | 4-4 | 13-8 | |
| May 16, 1904 | St. Louis Browns 4 at Philadelphia Athletics 5 | W | 10-4 | 4-4 | 14-8 | |
| May 17, 1904 | St. Louis Browns 2 at Philadelphia Athletics 0 | L | 10-5 | 4-4 | 14-9 | |
| May 18, 1904 | St. Louis Browns 4 at Philadelphia Athletics 9 | W | 11-5 | 4-4 | 15-9 | |
| May 19, 1904 | St. Louis Browns 4 at Philadelphia Athletics 3 | L | 11-6 | 4-4 | 15-10 | |
| May 20, 1904 | Cleveland Naps 8 at Philadelphia Athletics 5 | L | 11-7 | 4-4 | 15-11 | |
| May 21, 1904 | Cleveland Naps 0 at Philadelphia Athletics 7 | W | 12-7 | 4-4 | 16-11 | |
| May 23, 1904 | Cleveland Naps 4 at Philadelphia Athletics 3 | L | 12-8 | 4-4 | 16-12 | |
| May 24, 1904 | Detroit Tigers 6 at Philadelphia Athletics 4 | L | 12-9 | 4-4 | 16-13 | |
| May 25, 1904 | Detroit Tigers 4 at Philadelphia Athletics 5 | W | 13-9 | 4-4 | 17-13 | |
| May 26, 1904 | Detroit Tigers 0 at Philadelphia Athletics 5 | W | 14-9 | 4-4 | 18-13 | |
| May 27, 1904 | New York Highlanders 5 at Philadelphia Athletics 7 | W | 15-9 | 4-4 | 19-13 | |
| May 28, 1904 | New York Highlanders 1 at Philadelphia Athletics 0 | L | 15-10 | 4-4 | 19-14 | |
| May 30, 1904 | Philadelphia Athletics 4 at New York Highlanders 7 | L | 15-10 | 4-5 | 19-15 | |
| May 30, 1904 | Philadelphia Athletics 1 at New York Highlanders 0 | W | 15-10 | 5-5 | 20-15 | |
| June 1, 1904 | Philadelphia Athletics 1 at St. Louis Browns 3 | L | 15-10 | 5-6 | 20-16 | |
| June 4, 1904 | Philadelphia Athletics 5 at St. Louis Browns 2 | W | 15-10 | 6-6 | 21-16 | |
| June 5, 1904 | Philadelphia Athletics 2 at Chicago White Sox 14 | L | 15-10 | 6-7 | 21-17 | |
| June 6, 1904 | Philadelphia Athletics 6 at Chicago White Sox 3 | W | 15-10 | 7-7 | 22-17 | |
| June 7, 1904 | Philadelphia Athletics 1 at Chicago White Sox 6 | L | 15-10 | 7-8 | 22-18 | |
| June 8, 1904 | Philadelphia Athletics 2 at Chicago White Sox 8 | L | 15-10 | 7-9 | 22-19 | |
| June 10, 1904 | Philadelphia Athletics 1 at Cleveland Naps 3 | L | 15-10 | 7-10 | 22-20 | |
| June 11, 1904 | Philadelphia Athletics 1 at Cleveland Naps 0 | W | 15-10 | 8-10 | 23-20 | |
| June 13, 1904 | Philadelphia Athletics 9 at Cleveland Naps 2 | W | 15-10 | 9-10 | 24-20 | |
| June 14, 1904 | Philadelphia Athletics 4 at Cleveland Naps 0 | W | 15-10 | 10-10 | 25-20 | |
| June 15, 1904 | Philadelphia Athletics 0 at Detroit Tigers 1 | L | 15-10 | 10-11 | 25-21 | |
| June 16, 1904 | Philadelphia Athletics 5 at Detroit Tigers 6 | L | 15-10 | 10-12 | 25-22 | |
| June 17, 1904 | Philadelphia Athletics 7 at Detroit Tigers 1 | W | 15-10 | 11-12 | 26-22 | |
| June 18, 1904 | Philadelphia Athletics 3 at Detroit Tigers 7 | L | 15-10 | 11-13 | 26-23 | |
| June 20, 1904 | Washington Senators 3 at Philadelphia Athletics 11 | W | 16-10 | 11-13 | 27-23 | |
| June 22, 1904 | Boston Americans 7 at Philadelphia Athletics 6 | L | 16-11 | 11-13 | 27-24 | |
| June 23, 1904 | Boston Americans 1 at Philadelphia Athletics 5 | W | 17-11 | 11-13 | 28-24 | |
| June 24, 1904 | Boston Americans 4 at Philadelphia Athletics 8 | W | 18-11 | 11-13 | 29-24 | |
| June 25, 1904 | Washington Senators 3 at Philadelphia Athletics 6 | W | 19-11 | 11-13 | 30-24 | |
| June 27, 1904 | Philadelphia Athletics 3 at Washington Senators 2 | W | 19-11 | 12-13 | 31-24 | |
| June 28, 1904 | Philadelphia Athletics 1 at Washington Senators 2 | L | 19-11 | 12-14 | 31-25 | |
| June 30, 1904 | Philadelphia Athletics 3 at Boston Americans 4 | L | 19-11 | 12-15 | 31-26 | |
| July 1, 1904 | Philadelphia Athletics 5 at Boston Americans 4 | W | 19-11 | 13-15 | 32-26 | |
| July 2, 1904 | Philadelphia Athletics 1 at Boston Americans 2 | L | 19-11 | 13-16 | 32-27 | |
| July 4, 1904 | New York Highlanders 9 at Philadelphia Athletics 3 | L | 19-12 | 13-16 | 32-28 | |
| July 4, 1904 | New York Highlanders 5 at Philadelphia Athletics 2 | L | 19-13 | 13-16 | 32-29 | |
| July 5, 1904 | Philadelphia Athletics 3 at New York Highlanders 6 | L | 19-13 | 13-17 | 32-30 | |
| July 6, 1904 | Philadelphia Athletics 1 at New York Highlanders 7 | L | 19-13 | 13-18 | 32-31 | |
| July 8, 1904 | Washington Senators 1 at Philadelphia Athletics 2 | W | 20-13 | 13-18 | 33-31 | |
| July 9, 1904 | Washington Senators 0 at Philadelphia Athletics 3 | W | 21-13 | 13-18 | 34-31 | |
| July 9, 1904 | Washington Senators 11 at Philadelphia Athletics 3 | L | 21-14 | 13-18 | 34-32 | |
| July 11, 1904 | Washington Senators 1 at Philadelphia Athletics 3 | W | 22-14 | 13-18 | 35-32 | |
| July 12, 1904 | Chicago White Sox 4 at Philadelphia Athletics 6 | W | 23-14 | 13-18 | 36-32 | |
| July 13, 1904 | Chicago White Sox 0 at Philadelphia Athletics 3 | W | 24-14 | 13-18 | 37-32 | |
| July 14, 1904 | Chicago White Sox 1 at Philadelphia Athletics 2 | W | 25-14 | 13-18 | 38-32 | |
| July 15, 1904 | Chicago White Sox 1 at Philadelphia Athletics 5 | W | 26-14 | 13-18 | 39-32 | |
| July 16, 1904 | St. Louis Browns 1 at Philadelphia Athletics 8 | W | 27-14 | 13-18 | 40-32 | |
| July 18, 1904 | St. Louis Browns 4 at Philadelphia Athletics 5 | W | 28-14 | 13-18 | 41-32 | |
| July 19, 1904 | St. Louis Browns 1 at Philadelphia Athletics 0 | L | 28-15 | 13-18 | 41-33 | |
| July 20, 1904 | St. Louis Browns 0 at Philadelphia Athletics 2 | W | 29-15 | 13-18 | 42-33 | |
| July 21, 1904 | Cleveland Naps 14 at Philadelphia Athletics 8 | L | 29-16 | 13-18 | 42-34 | |
| July 22, 1904 | Cleveland Naps 4 at Philadelphia Athletics 0 | L | 29-17 | 13-18 | 42-35 | |
| July 23, 1904 | Cleveland Naps 3 at Philadelphia Athletics 2 | L | 29-18 | 13-18 | 42-36 | |
| July 23, 1904 | Cleveland Naps 4 at Philadelphia Athletics 1 | L | 29-19 | 13-18 | 42-37 | |
| July 26, 1904 | Detroit Tigers 2 at Philadelphia Athletics 1 | L | 29-20 | 13-18 | 42-38 | |
| July 27, 1904 | Detroit Tigers 0 at Philadelphia Athletics 5 | W | 30-20 | 13-18 | 43-38 | |
| July 28, 1904 | Detroit Tigers 0 at Philadelphia Athletics 4 | W | 31-20 | 13-18 | 44-38 | |
| July 29, 1904 | Detroit Tigers 0 at Philadelphia Athletics 2 | W | 32-20 | 13-18 | 45-38 | |
| July 30, 1904 | Detroit Tigers 1 at Philadelphia Athletics 4 | W | 33-20 | 13-18 | 46-38 | |
| August 1, 1904 | Philadelphia Athletics 4 at St. Louis Browns 0 | W | 33-20 | 14-18 | 47-38 | |
| August 2, 1904 | Philadelphia Athletics 9 at St. Louis Browns 3 | W | 33-20 | 15-18 | 48-38 | |
| August 3, 1904 | Philadelphia Athletics 10 at St. Louis Browns 4 | W | 33-20 | 16-18 | 49-38 | |
| August 5, 1904 | Philadelphia Athletics 4 at Chicago White Sox 3 | W | 33-20 | 17-18 | 50-38 | |
| August 6, 1904 | Philadelphia Athletics 1 at Chicago White Sox 8 | L | 33-20 | 17-19 | 50-39 | |
| August 7, 1904 | Philadelphia Athletics 5 at Chicago White Sox 2 | W | 33-20 | 18-19 | 51-39 | |
| August 8, 1904 | Philadelphia Athletics 6 at Chicago White Sox 5 | W | 33-20 | 19-19 | 52-39 | |
| August 11, 1904 | Philadelphia Athletics 2 at Cleveland Naps 1 | W | 33-20 | 20-19 | 53-39 | |
| August 12, 1904 | Philadelphia Athletics 5 at Cleveland Naps 0 | W | 33-20 | 21-19 | 54-39 | |
| August 13, 1904 | Philadelphia Athletics 2 at Cleveland Naps 7 | L | 33-20 | 21-20 | 54-40 | |
| August 15, 1904 | Philadelphia Athletics 2 at Detroit Tigers 0 | W | 33-20 | 22-20 | 55-40 | |
| August 16, 1904 | Philadelphia Athletics 6 at Detroit Tigers 3 | W | 33-20 | 23-20 | 56-40 | |
| August 17, 1904 | Philadelphia Athletics 3 at Detroit Tigers 3 | | 33-20 | 23-20 | 56-40 | |
| August 19, 1904 | Cleveland Naps 2 at Philadelphia Athletics 1 | L | 33-21 | 23-20 | 56-41 | |
| August 20, 1904 | Cleveland Naps 0 at Philadelphia Athletics 2 | W | 34-21 | 23-20 | 57-41 | |
| August 22, 1904 | Cleveland Naps 1 at Philadelphia Athletics 3 | W | 35-21 | 23-20 | 58-41 | |
| August 23, 1904 | Cleveland Naps 4 at Philadelphia Athletics 3 | L | 35-22 | 23-20 | 58-42 | |
| August 24, 1904 | Detroit Tigers 7 at Philadelphia Athletics 5 | L | 35-23 | 23-20 | 58-43 | |
| August 25, 1904 | Detroit Tigers 7 at Philadelphia Athletics 2 | L | 35-24 | 23-20 | 58-44 | |
| August 26, 1904 | Detroit Tigers 4 at Philadelphia Athletics 7 | W | 36-24 | 23-20 | 59-44 | |
| August 27, 1904 | Detroit Tigers 3 at Philadelphia Athletics 4 | W | 37-24 | 23-20 | 60-44 | |
| August 29, 1904 | Chicago White Sox 1 at Philadelphia Athletics 4 | W | 38-24 | 23-20 | 61-44 | |
| August 30, 1904 | Chicago White Sox 3 at Philadelphia Athletics 0 | L | 38-25 | 23-20 | 61-45 | |
| August 31, 1904 | Chicago White Sox 0 at Philadelphia Athletics 1 | W | 39-25 | 23-20 | 62-45 | |
| September 1, 1904 | St. Louis Browns 2 at Philadelphia Athletics 0 | L | 39-26 | 23-20 | 62-46 | |
| September 3, 1904 | St. Louis Browns 4 at Philadelphia Athletics 2 | L | 39-27 | 23-20 | 62-47 | |
| September 3, 1904 | St. Louis Browns 2 at Philadelphia Athletics 5 | W | 40-27 | 23-20 | 63-47 | |
| September 5, 1904 | Philadelphia Athletics 1 at New York Highlanders 2 | L | 40-27 | 23-21 | 63-48 | |
| September 5, 1904 | Philadelphia Athletics 7 at New York Highlanders 2 | W | 40-27 | 24-21 | 64-48 | |
| September 6, 1904 | Philadelphia Athletics 2 at New York Highlanders 5 | L | 40-27 | 24-22 | 64-49 | |
| September 6, 1904 | Philadelphia Athletics 1 at New York Highlanders 2 | L | 40-27 | 24-23 | 64-50 | |
| September 7, 1904 | New York Highlanders 0 at Philadelphia Athletics 3 | W | 41-27 | 24-23 | 65-50 | |
| September 8, 1904 | New York Highlanders 3 at Philadelphia Athletics 2 | L | 41-28 | 24-23 | 65-51 | |
| September 8, 1904 | New York Highlanders 5 at Philadelphia Athletics 1 | L | 41-29 | 24-23 | 65-52 | |
| September 9, 1904 | New York Highlanders 2 at Philadelphia Athletics 3 | W | 42-29 | 24-23 | 66-52 | |
| September 9, 1904 | New York Highlanders 1 at Philadelphia Athletics 5 | W | 43-29 | 24-23 | 67-52 | |
| September 10, 1904 | Boston Americans 0 at Philadelphia Athletics 1 | W | 44-29 | 24-23 | 68-52 | |
| September 12, 1904 | Boston Americans 6 at Philadelphia Athletics 4 | L | 44-30 | 24-23 | 68-53 | |
| September 12, 1904 | Boston Americans 2 at Philadelphia Athletics 6 | W | 45-30 | 24-23 | 69-53 | |
| September 13, 1904 | Boston Americans 0 at Philadelphia Athletics 0 | | 45-30 | 24-23 | 69-53 | |
| September 15, 1904 | Washington Senators 4 at Philadelphia Athletics 8 | W | 46-30 | 24-23 | 70-53 | |
| September 15, 1904 | Washington Senators 3 at Philadelphia Athletics 4 | W | 47-30 | 24-23 | 71-53 | |
| September 16, 1904 | Washington Senators 5 at Philadelphia Athletics 3 | L | 47-31 | 24-23 | 71-54 | |
| September 17, 1904 | Philadelphia Athletics 4 at Boston Americans 3 | W | 47-31 | 25-23 | 72-54 | |
| September 19, 1904 | Philadelphia Athletics 6 at Boston Americans 1 | W | 47-31 | 26-23 | 73-54 | |
| September 20, 1904 | Philadelphia Athletics 1 at Boston Americans 11 | L | 47-31 | 26-24 | 73-55 | |
| September 21, 1904 | Philadelphia Athletics 1 at Boston Americans 5 | L | 47-31 | 26-25 | 73-56 | |
| September 21, 1904 | Philadelphia Athletics 3 at Boston Americans 4 | L | 47-31 | 26-26 | 73-57 | |
| September 24, 1904 | Philadelphia Athletics 0 at Chicago White Sox 4 | L | 47-31 | 26-27 | 73-58 | |
| September 25, 1904 | Philadelphia Athletics 0 at Chicago White Sox 4 | L | 47-31 | 26-28 | 73-59 | |
| September 26, 1904 | Philadelphia Athletics 2 at Chicago White Sox 1 | W | 47-31 | 27-28 | 74-59 | |
| September 27, 1904 | Philadelphia Athletics 2 at St. Louis Browns 4 | L | 47-31 | 27-29 | 74-60 | |
| September 27, 1904 | Philadelphia Athletics 0 at St. Louis Browns 0 | | 47-31 | 27-29 | 74-60 | |
| September 28, 1904 | Philadelphia Athletics 1 at St. Louis Browns 5 | L | 47-31 | 27-30 | 74-61 | |
| September 28, 1904 | Philadelphia Athletics 0 at St. Louis Browns 5 | L | 47-31 | 27-31 | 74-62 | |
| September 29, 1904 | Philadelphia Athletics 1 at St. Louis Browns 0 | W | 47-31 | 28-31 | 75-62 | |
| September 29, 1904 | Philadelphia Athletics 1 at St. Louis Browns 6 | L | 47-31 | 28-32 | 75-63 | |
| September 30, 1904 | Philadelphia Athletics 9 at Detroit Tigers 4 | W | 47-31 | 29-32 | 76-63 | |
| September 30, 1904 | Philadelphia Athletics 4 at Detroit Tigers 5 | L | 47-31 | 29-33 | 76-64 | |
| October 1, 1904 | Philadelphia Athletics 2 at Detroit Tigers 3 | L | 47-31 | 29-34 | 76-65 | |
| October 1, 1904 | Philadelphia Athletics 1 at Detroit Tigers 2 | L | 47-31 | 29-35 | 76-66 | |
| October 3, 1904 | Philadelphia Athletics 2 at Cleveland Naps 0 | W | 47-31 | 30-35 | 77-66 | |
| October 3, 1904 | Philadelphia Athletics 2 at Cleveland Naps 7 | L | 47-31 | 30-36 | 77-67 | |
| October 4, 1904 | Philadelphia Athletics 4 at Cleveland Naps 0 | W | 47-31 | 31-36 | 78-67 | |
| October 7, 1904 | Philadelphia Athletics 3 at Washington Senators 2 | W | 47-31 | 32-36 | 79-67 | |
| October 7, 1904 | Philadelphia Athletics 2 at Washington Senators 3 | L | 47-31 | 32-37 | 79-68 | |
| October 8, 1904 | Philadelphia Athletics 5 at Washington Senators 12 | L | 47-31 | 32-38 | 79-69 | |
| October 8, 1904 | Philadelphia Athletics 2 at Washington Senators 0 | W | 47-31 | 33-38 | 80-69 | |
| October 10, 1904 | Philadelphia Athletics 7 at Washington Senators 6 | W | 47-31 | 34-38 | 81-69 | |
| October 10, 1904 | Philadelphia Athletics 3 at Washington Senators 4 | L | 47-31 | 34-39 | 81-70 | |
