| Date | Transaction | |||
| 7/31/03 | Acquired RHP Jeff Suppan, RHP Brandon Lyon and RHP Anastacio Martinez from the Pittsburgh Pirates in exchange for INF Freddy Sanchez, LHP Mike Gonzalez and cash considerations. | |||
| 7/30/03 | Released RHP Chad Fox; recalled RHP Jason Shiell from Pawtucket (AAA). | |||
| 7/29/03 | Acquired RHP Scott Williamson from the Cincinnati Reds in exchange for minor league LHP Phil Dumatrait, a minor league player to be named and cash considerations. | |||
| 7/28/03 | Optioned LHP Casey Fossum to Pawtucket (AAA); purchased the contract of INF/OF Lou Collier from Pawtucket and added him to the roster. | |||
| 7/27/03 | Mike Nicolas: Released RHP Mike Nicolas. | |||
| 7/22/03 | Acquired LHP Scott Sauerbeck and LHP Mike Gonzalez from the Pittsburgh Pirates in exchange for RHP Brandon Lyon and RHP Anastacio Martinez; assigned Gonzalez to Pawtucket (AAA). | |||
| 7/17/03 | Optioned INF Freddy Sanchez and RHP Jason Shiell to Pawtucket (AAA). | |||
| Activated LHP Casey Fossum and OF Jeremy Giambi from 15-day DL. | ||||
| 7/11/03 | Bryan Hebson: Claimed RHP Bryan Hebson off waivers from the Montreal Expos and assigned him to Pawtucket (AAA). | |||
| 7/5/03 | Activated RHP Ramiro Mendoza from the 15-day DL; optioned RHP Ryan Rupe to Pawtucket (AAA). | |||
| 7/2/03 | Signed RHP Todd Jones and added him to the active roster, wearing #59; designated RHP Hector Almonte for assignment. | |||
| 7/1/03 | Chad Fox: Activated RHP Chad Fox from the 15-day DL. | |||
