Oakland Athletics
Development Update |  | | Friday, June 11th, 2021 | | Starting Pitcher R. Baker (Phoenix Athletics, Rookie League) pitching potential INCREASES. |
| Wednesday, June 2nd, 2021 | | Starting Pitcher P. Hernández (Stockton Ports, Single A) pitching potential DROPS. |
| Friday, May 21st, 2021 | | Starting Pitcher J. Moya (Sacramento River Cats, Triple A) pitching potential DROPS. |
| Sunday, May 16th, 2021 | | Starting Pitcher A. Calleja (Sacramento River Cats, Triple A) pitching potential INCREASES. |
| Friday, April 30th, 2021 | | Starting Pitcher G. Soto (Stockton Ports, Single A) pitching potential DROPS. | | Reliever P. Thomas (Midland RockHounds, Double A) pitching potential INCREASES. |
| Friday, April 23rd, 2021 | | Reliever E. King (Vancouver Canadians, Short Season A) pitching potential DROPS. |
| Saturday, April 17th, 2021 | | Catcher P. Fox (Vancouver Canadians, Short Season A) hitting potential DROPS. |
| Thursday, April 15th, 2021 | | Reliever C. Ruíz (Midland RockHounds, Double A) pitching potential INCREASES. |
| Sunday, April 11th, 2021 | | Third Base V. Sanchez (Sacramento River Cats, Triple A) hitting potential INCREASES. |
| Saturday, April 10th, 2021 | | Shortstop J. Romero (Stockton Ports, Single A) hitting potential INCREASES. |
| Saturday, April 3rd, 2021 | | Reliever J. Smart (Phoenix Athletics, Rookie League) pitching potential DROPS. |
| Friday, April 2nd, 2021 | | Third Base C. Hockin (Midland RockHounds, Double A) hitting potential DROPS. |
| Saturday, March 27th, 2021 | | Catcher C. Riggs (Stockton Ports, Single A) hitting potential DROPS. | | Starting Pitcher A. Gabriel (Vancouver Canadians, Short Season A) pitching potential INCREASES. |
| Wednesday, March 24th, 2021 | | Starting Pitcher P. Hernández (Stockton Ports, Single A) pitching potential DROPS. | | Reliever J. Kang (Midland RockHounds, Double A) pitching potential INCREASES. |
| Sunday, March 21st, 2021 | | Closer J. Valera (Midland RockHounds, Double A) pitching potential INCREASES. | | Second Base R. Partin (Sacramento River Cats, Triple A) hitting potential DROPS. |
| Saturday, March 13th, 2021 | | Second Base L. Rosa (Vancouver Canadians, Short Season A) hitting potential DROPS. | | Right Field P. González (Stockton Ports, Single A) hitting potential DROPS. |
| Friday, March 12th, 2021 | | Third Base J. González (Midland RockHounds, Double A) hitting potential INCREASES. |
| Friday, March 5th, 2021 | | Reliever R. Smith (Kane County Cougars, Single A) pitching potential INCREASES. |
| Thursday, March 4th, 2021 | | Starting Pitcher S. Ficquelmont (Kane County Cougars, Single A) pitching potential INCREASES. | | Starting Pitcher B. Santana (Midland RockHounds, Double A) pitching potential DROPS. | | Starting Pitcher S. Galló (Stockton Ports, Single A) pitching potential INCREASES. |
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