| 2021 Schedule For OAK | ||
| Month | Game | Matchup |
| March | 1 | OAK at DUB |
| March | 2 | OAK at DUB |
| March | 3 | OAK at DUB |
| March | OFF | |
| March | 4 | OAK at CHI |
| March | 5 | OAK at CHI |
| March | 6 | OAK at CHI |
| March | 7 | VRN at OAK |
| March | 8 | VRN at OAK |
| March | 9 | VRN at OAK |
| March | 10 | OAK at CRC |
| March | 11 | OAK at CRC |
| March | 12 | OAK at CRC |
| March | OFF | |
| March | 13 | OAK at DYE |
| March | 14 | OAK at DYE |
| March | 15 | OAK at DYE |
| March | 16 | HUC at OAK |
| March | 17 | HUC at OAK |
| March | 18 | HUC at OAK |
| March | 19 | BUR at OAK |
| March | 20 | BUR at OAK |
| March | 21 | BUR at OAK |
| April | 1 | OAK at GGG |
| April | 2 | OAK at GGG |
| April | 3 | OAK at GGG |
| April | OFF | |
| April | 4 | WRK at OAK |
| April | 5 | WRK at OAK |
| April | 6 | WRK at OAK |
| April | 7 | OAK at CUB |
| April | 8 | OAK at CUB |
| April | 9 | OAK at CUB |
| April | 10 | OAK at TAM |
| April | 11 | OAK at TAM |
| April | 12 | OAK at TAM |
| April | OFF | |
| April | 13 | SYI at OAK |
| April | 14 | SYI at OAK |
| April | 15 | SYI at OAK |
| April | 16 | DUB at OAK |
| April | 17 | DUB at OAK |
| April | 18 | DUB at OAK |
| April | 19 | CHI at OAK |
| April | 20 | CHI at OAK |
| April | 21 | CHI at OAK |
| May | 1 | OAK at VRN |
| May | 2 | OAK at VRN |
| May | 3 | OAK at VRN |
| May | OFF | |
| May | 4 | * AAR at OAK |
| May | 5 | * AAR at OAK |
| May | 6 | * AAR at OAK |
| May | 7 | * AAR at OAK |
| May | 8 | * AAR at OAK |
| May | 9 | * OAK at NYY |
| May | 10 | * OAK at NYY |
| May | 11 | * OAK at NYY |
| May | 12 | * OAK at NYY |
| May | OFF | |
| May | 13 | * OAK at HMA |
| May | 14 | * OAK at HMA |
| May | 15 | * OAK at HMA |
| May | 16 | * OAK at HMA |
| May | 17 | * OAK at HMA |
| May | 18 | * NYY at OAK |
| May | 19 | * NYY at OAK |
| May | 20 | * NYY at OAK |
| May | 21 | * NYY at OAK |
| May | OFF | |
| May | 22 | CRC at OAK |
| May | 23 | CRC at OAK |
| May | 24 | CRC at OAK |
| June | 1 | DYE at OAK |
| June | 2 | DYE at OAK |
| June | 3 | DYE at OAK |
| June | 4 | OAK at HUC |
| June | 5 | OAK at HUC |
| June | 6 | OAK at HUC |
| June | OFF | |
| June | 7 | * HMA at OAK |
| June | 8 | * HMA at OAK |
| June | 9 | * HMA at OAK |
| June | 10 | * HMA at OAK |
| June | 11 | * HMA at OAK |
| June | 12 | * OAK at HOH |
| June | 13 | * OAK at HOH |
| June | 14 | * OAK at HOH |
| June | 15 | * OAK at HOH |
| June | OFF | |
| June | 16 | * OAK at AAR |
| June | 17 | * OAK at AAR |
| June | 18 | * OAK at AAR |
| June | 19 | * OAK at AAR |
| June | 20 | * OAK at AAR |
| June | 21 | * HOH at OAK |
| June | 22 | * HOH at OAK |
| June | 23 | * HOH at OAK |
| June | 24 | * HOH at OAK |
| All Star Break | OFF | |
| All Star Break | OFF | |
| All Star Break | OFF | |
| July | 1 | OAK at BUR |
| July | 2 | OAK at BUR |
| July | 3 | OAK at BUR |
| July | 4 | GGG at OAK |
| July | 5 | GGG at OAK |
| July | 6 | GGG at OAK |
| July | OFF | |
| July | 7 | * NYY at OAK |
| July | 8 | * NYY at OAK |
| July | 9 | * NYY at OAK |
| July | 10 | * NYY at OAK |
| July | 11 | * NYY at OAK |
| July | 12 | * OAK at AAR |
| July | 13 | * OAK at AAR |
| July | 14 | * OAK at AAR |
| July | 15 | * OAK at AAR |
| July | OFF | |
| July | 16 | COL at OAK |
| July | 17 | COL at OAK |
| July | 18 | COL at OAK |
| July | 19 | OAK at SRD |
| July | 20 | OAK at SRD |
| July | 21 | OAK at SRD |
| July | 22 | CAL at OAK |
| July | 23 | CAL at OAK |
| July | 24 | CAL at OAK |
| Trade Deadline | OFF | |
| August | 1 | OAK at WRK |
| August | 2 | OAK at WRK |
| August | 3 | OAK at WRK |
| August | 4 | CUB at OAK |
| August | 5 | CUB at OAK |
| August | 6 | CUB at OAK |
| August | OFF | |
| August | 7 | * OAK at NYY |
| August | 8 | * OAK at NYY |
| August | 9 | * OAK at NYY |
| August | 10 | * OAK at NYY |
| August | 11 | * OAK at NYY |
| August | 12 | * HMA at OAK |
| August | 13 | * HMA at OAK |
| August | 14 | * HMA at OAK |
| August | 15 | * HMA at OAK |
| August | OFF | |
| August | 16 | * HOH at OAK |
| August | 17 | * HOH at OAK |
| August | 18 | * HOH at OAK |
| August | 19 | * HOH at OAK |
| August | 20 | * HOH at OAK |
| August | 21 | * OAK at HMA |
| August | 22 | * OAK at HMA |
| August | 23 | * OAK at HMA |
| August | 24 | * OAK at HMA |
| September | 1 | TAM at OAK |
| September | 2 | TAM at OAK |
| September | 3 | TAM at OAK |
| September | 4 | OAK at SYI |
| September | 5 | OAK at SYI |
| September | 6 | OAK at SYI |
| September | OFF | |
| September | 7 | * OAK at HOH |
| September | 8 | * OAK at HOH |
| September | 9 | * OAK at HOH |
| September | 10 | * OAK at HOH |
| September | 11 | * OAK at HOH |
| September | 12 | * AAR at OAK |
| September | 13 | * AAR at OAK |
| September | 14 | * AAR at OAK |
| September | 15 | * AAR at OAK |
| September | OFF | |
| September | 16 | OAK at COL |
| September | 17 | OAK at COL |
| September | 18 | OAK at COL |
| September | 19 | SRD at OAK |
| September | 20 | SRD at OAK |
| September | 21 | SRD at OAK |
| September | 22 | OAK at CAL |
| September | 23 | OAK at CAL |
| September | 24 | OAK at CAL |