| Date | Player | Transaction |
|---|---|---|
| 9/15/97 | B.J.Waszgis | Designated for assignment |
| 9/15/97 | Eric Davis | Activated from the DL |
| 9/15/97 | Danny Clyburn Esteban Yan | Called up from AAA |
| 9/11/97 | Charlie Greene | Claimed off waivers from the Mets |
| 9/8/97 | Mel Rosario David Dellucci | Called up from AA Called up from AAA |
| 9/8/97 | Francisco Saneaux | Designated for assignment |
| 9/4/97 | Nerio Rodriguez | Called up from AAA |
| 9/1/97 | Brian Williams | Called up from AAA |
| 9/1/97 | Shawn Boskie | Activated from the DL |
| 8/26/97 | Bill Swift | Signed to a minor league contract |
| 8/26/97 | Roberto Alomar | Activated from the DL |
| 8/26/97 | Esteban Yan | Optioned to AAA |
| 8/17/97 | Esteban Yan | Called up from AAA |
| 7/31/97 | Rocky Coppinger | Sent to AAA on rehabilitation |
| 7/31/97 | PTBNL | Acquired from the Expos for Mike Johnson |
| 7/30/97 | Roberto Alomar | Placed on 15-day DL |
| 7/29/97 | Harold Baines | Acquired from the White Sox for a PTBNL (Juan Bautista) |
| 7/28/97 | Rick Krivda | Called up from AAA |
| 7/28/97 | Mike Johnson | Designated for assignment |
| 7/25/97 | Pete Incaviglia | Released |
| 7/18/97 | Tim Laker | Designated for assignment |
| 7/15/97 | Aaron Ledesma | Called up from AAA |
| 7/14/97 | Pete Incaviglia | Designated for assignment |
| 7/14/97 | Rocky Coppinger Chris Hoiles | Sent to AAA on rehabilitation |
| 6/29/97 | David Dellucci | Sent to AA |
| 6/27/97 | Geronimo Berroa | Acquired from the Athletics for Jimmy Haynes & PTBNL |
| 6/18/97 | Tim Laker | Called up from AA |
| 6/15/97 | Brian Williams | Sent to AAA |
| 5/31/97 | David Dellucci | Called up from AA |
| 5/14/97 | Giovanni Carrara | Released |
| 5/10/97 | Brian Williams | Called up from AAA |
| 5/3/97 | Mike Mussina | Re-signed to a three year extension |
| 4/25/97 | Tony Tarasco | Called up from AAA |
| 4/7/97 | Tony Tarasco | Sent to AAA |
| 3/31/97 | Tim Laker | Sent to AAA |
| 3/31/97 | Mike Johnson Scott Kamieniecki Lenny Webster Jerome Walton | Called up from AAA |
| 3/27/97 | Rick Krivda | Cleared waivers, sent to AAA |
| 3/25/97 | Brian Williams | Sent to AAA |
| 3/25/97 | Tim Laker | Claimed off waivers from the Expos |
| 3/22/97 | Hector Ramirez | Acquired from the Mets for Manny Alexander and Scott McClain |
| 3/21/97 | Giovanni Carrara Nerio Rodriguez | Sent to AAA |
| 3/11/97 | Danny Clyburn | Optioned to Rochester |
| 3/11/97 | Wady Almonte Eugene Kingsale Julio Moreno | Optioned to Bowie |
| 3/11/97 | Francisco Saneaux | Optioned to Frederick |
| 3/11/97 | Ryan Minor Mel Rosario Aaron Ledesma | Assigned to minor league camp |
| 3/6/97 | Esteban Yan | Sent to AAA |
| 2/25/97 | Rick Krivda | Re-signed to a one year deal |
| 2/15/97 | Mike Mussina | Re-signed to a one year deal |
| 2/11/97 | Jimmy Haynes | Re-signed to a one year deal |
| 2/5/97 | Jeffrey Hammonds | Re-signed to a one year deal |
| 1/30/97 | Jeff Reboulet | Signed to a minor league contract |
| 1/22/97 | Scott Kamieniecki | Signed to a minor league contract |
| 1/21/97 | Alan Mills | Re-signed to a two year deal |
| 1/21/97 | Terry Mathews | Re-signed to a two year deal |
| 1/21/97 | Arthur Rhodes | Re-signed to a two year deal, with an option year |
| 1/21/97 | Brian Williams | Signed to a minor league contract |
| 1/13/97 | Giovanni Garrara Shawn Boskie | Signed to a minor league contract |
| 1/9/97 | Leroy McKinnis | Acquired from the Padres for Mark Smith |
| 12/19/96 | Kelly Gruber | Signed to a minor league contract |
| 12/19/96 | Eric Davis | Signed to a contract as a free agent |
| 12/19/96 | Pete Incaviglia | Re-signed to a one year deal |
| 12/19/96 | Billy Percibal | Designated for assignment |
| 12/18/96 | Jerome Walton Lenny Webster | Signed to a contract as a free agent |
| 12/16/96 | Shawn Boskie | Signed to a one year contract as a free agent from the Angels |
| 12/12/96 | Mike Bordick | Signed to a three year deal, with an option year, from the A's |
| 12/8/96 | Jimmy Key | Signed to a two year deal, with an option year, from the Yankees |
| 11/21/96 | WBAL | Reached agreement on 3-year extension to broadcasting contract |
| 11/20/96 | Domingo Martinez | Added to 40-man roster |
| 11/19/96 | Wady Almonte Danny Clyburn Julio Moreno Francisco Saneaux | Added to 40-man roster |
| 11/19/96 | Mark Smith Aaron Lane | Outrighted to Rochester |
| 11/19/96 | Mike Milchin | Released |
| 11/15/96 | Jesse Orosco | Offered salary arbitration |
| 11/15/96 | Bobby Bonilla Eddie Murray Mark Parent | Declined to offer salary arbitration |
| 11/12/96 | Giovanni Carrara | Signed to a minor league contract, invited to ST |
| 11/12/96 | Domingo Martinez Brian Shouse | Re-signed to a minor league contract as minor-league FAs |
| 10/30/96 | Brian Ebel | Named assistant trainer |
| 10/30/96 | Kevin Harmon | Promoted to minor league medical coordinator |
| 10/28/96 | Brady Anderson | Exercised option on contract |
| 10/16/96 | Domingo Martinez Brian Shouse | Signed to a two year deal, with an option year, as pitching coach |
| 10/15/96 | Pat Dobson | Fired |