| | | Wednesday, September 10th, 2003 | | Signed Manager Elroy Futon to a 1-year contract extension. |
| Saturday, August 9th, 2003 | | Designated LF Vince Valiant for assignment. |
| Friday, August 1st, 2003 | | Promoted C Antwan Smithers from Double A Reno to Triple A Milwaukee. | | Demoted MR Fernando Ayala from Triple A Milwaukee to Double A Reno. | | Demoted C Nelson Shambrook from Triple A Milwaukee to Double A Reno. | | Demoted 2B Ulises Barcenas from Triple A Milwaukee to Double A Reno. | | Demoted CL Pavel Hendriks from Double A Reno to Single A Pahrump. | | Demoted 2B Stu Walker from Double A Reno to Single A Pahrump. | | Demoted RF Donald Hodge from Double A Reno to Single A Pahrump. | | Demoted SP Ernesto Zaragoza from Single A Pahrump to Rookie League Roswell. | | Demoted 2B Sid Moss from Single A Pahrump to Rookie League Roswell. | | Demoted LF Freek Vroom from Single A Pahrump to Rookie League Roswell. | | Demoted RF Pat Long from Single A Pahrump to Rookie League Roswell. | | Released SS Aaron Barnes.(Career-ending injury) | | Placed 1B Jorge Hernández on the Spike Nolan League 10-day disabled list, retroactive to 07/31/2003. | | Traded 34-year-old reliever Pedro Martinez, 31-year-old left fielder Pio Vallejo, 22-year-old minor league starting pitcher Grady Powers and 23-year-old minor league second baseman Dave Slater to the Madison Wolves, getting 33-year-old third baseman John Catron, 30-year-old closer Jerry Bostic and 24-year-old minor league starting pitcher Terry Dumont in return. | | Traded 33-year-old center fielder Jimmy Slizz and 24-year-old minor league reliever Randy Owens to the Greenville Moonshiners, getting 23-year-old minor league starting pitcher Gabriel Goodwin in return. | | Traded 26-year-old reliever Timothy Devinney to the Montreal Blazers, getting 41-year-old left fielder Gary Barr in return. | | Placed SP Terry Dumont on the 10-day disabled list, retroactive to 04/26/2003. | | Placed SP Gabriel Goodwin on the 40-man roster. | | Demoted SP Gabriel Goodwin to Triple A Milwaukee. | | Placed CL Jerry Bostic on the 40-man roster. | | Placed CL Jerry Bostic on the active roster. | | Placed 1B John Catron on the 40-man roster. | | Placed 1B John Catron on the active roster. | | Placed CF Gary Barr on the 10-day disabled list, retroactive to 04/07/2003. | | Recalled CF Jeff Washington from Double A Reno. | | Recalled SP Francisco Lueras from Triple A Milwaukee. |
| Wednesday, June 25th, 2003 | | Signed CF Jay Burns to a 2-year contract extension worth a total of $2,650,000. |
| Tuesday, June 24th, 2003 | | Signed Daryl White to a minor league contract with a signing bonus of $400,000. |
| Sunday, June 22nd, 2003 | | Signed Grady Powers to a minor league contract with a signing bonus of $320,000. |
| Friday, June 20th, 2003 | | Signed Brandon Hammond to a minor league contract with a signing bonus of $20,000. |
| Monday, June 16th, 2003 | | Signed Norm Young to a minor league contract with a signing bonus of $50,000. |
| Saturday, June 14th, 2003 | | Signed Ben Hargrove to a minor league contract with a signing bonus of $70,000. |
| Friday, June 13th, 2003 | | Signed Gabriel Ward to a minor league contract with a signing bonus of $30,000. | | Placed LF Pio Vallejo on the 10-day disabled list. | | Placed 3B Jose Oliva on the 40-man roster. | | Placed 3B Jose Oliva on the active roster. |
| Wednesday, June 11th, 2003 | | 3B Jose Oliva was designated for assignment and placed on waivers. | | Purchased the contract of CF Jeff Washington from Double A Reno. | | 3B Jose Oliva was designated for assignment and placed on waivers. | | Purchased the contract of CF Jeff Washington from Double A Reno. | | Drafted SP Grady Powers in the 2003 first-year player draft (Round 1, Pick 19, 19th overall pick). | | Drafted RF Ben Hargrove in the 2003 first-year player draft (Round 2, Pick 20, 55th overall pick). | | Drafted SP Norm Young in the 2003 first-year player draft (Round 3, Pick 22, 84th overall pick). | | Drafted MR Gabriel Ward in the 2003 first-year player draft (Round 4, Pick 18, 109th overall pick). | | Drafted CF Brandon Hammond in the 2003 first-year player draft (Round 5, Pick 18, 133rd overall pick). | | Drafted C Jimmy von Hammer in the 2003 first-year player draft (Round 6, Pick 18, 157th overall pick). | | Drafted CL José Zamora in the 2003 first-year player draft (Round 7, Pick 18, 181st overall pick). | | Drafted MR Michael O'Neill in the 2003 first-year player draft (Round 8, Pick 18, 205th overall pick). | | Drafted CF Kevin Ford in the 2003 first-year player draft (Round 9, Pick 18, 229th overall pick). | | Drafted SP Ernesto Zaragoza in the 2003 first-year player draft (Round 10, Pick 18, 253rd overall pick). | | Drafted SP Bobby Hanson in the 2003 first-year player draft (Round 11, Pick 18, 277th overall pick). | | Drafted 2B Sid Moss in the 2003 first-year player draft (Round 12, Pick 18, 301st overall pick). | | Drafted CF Melvin Farrell in the 2003 first-year player draft (Round 13, Pick 18, 325th overall pick). | | Drafted 2B Daryl White in the 2003 first-year player draft (Round 14, Pick 18, 349th overall pick). | | Drafted MR Enrique Ortíz in the 2003 first-year player draft (Round 15, Pick 18, 373rd overall pick). | | Drafted MR Tom Tucker in the 2003 first-year player draft (Round 16, Pick 18, 397th overall pick). | | Drafted MR José Sánchez in the 2003 first-year player draft (Round 17, Pick 18, 421st overall pick). | | Drafted MR Ken Black in the 2003 first-year player draft (Round 18, Pick 18, 445th overall pick). | | Drafted MR Duane McBride in the 2003 first-year player draft (Round 19, Pick 18, 469th overall pick). | | Drafted MR José Barrón in the 2003 first-year player draft (Round 20, Pick 18, 493rd overall pick). |
| Tuesday, May 13th, 2003 | | Signed free agent SS Pedro Amoros to a minor league contract. |
| Thursday, May 1st, 2003 | | Granted LF Bobby Bonds, Jr. free agency because of a contract clause. |
| Thursday, March 20th, 2003 | | Signed MR Ernest Nilson to a 3-year contract extension worth a total of $6,000,000. |
| Friday, March 7th, 2003 | | Signed 2B Brent Gates to a 4-year contract extension worth a total of $17,600,000. |
| Thursday, March 6th, 2003 | | Signed LF Fred Potts to a minor league contract extension. | | Signed 3B Jake Urban to a 8-year contract extension worth a total of $72,000,000. | | Signed C John Willhite to a minor league contract extension. | | Signed LF Floyd Freel to a minor league contract extension. | | Signed LF Rémi Rey to a minor league contract extension. | | Signed C Nelson Shambrook to a minor league contract extension. | | Signed SS Lionel Nardo to a minor league contract extension. | | Signed MR Zéphirin Fortin to a minor league contract extension. | | Signed CF Juan Quintanilla to a minor league contract extension. | | Signed CF Robinson Ramos to a minor league contract extension. | | Signed MR Forrest O'Quinn to a minor league contract extension. | | Signed SP Steve Roberge to a minor league contract extension. | | Signed LF Lance Henry to a minor league contract extension. |
| Saturday, December 28th, 2002 | | Placed 3B Tony Lawnmeier on the Rupert Horn Memorial League 10-day disabled list, retroactive to 12/26/2002. |
| Monday, December 16th, 2002 | | Signed free agent LF Fred Potts to a minor league contract. | | Signed free agent C John Willhite to a minor league contract. | | Signed free agent C Nelson Shambrook to a minor league contract. | | Signed free agent SS Lionel Nardo to a minor league contract. | | Signed free agent MR Zéphirin Fortin to a minor league contract. |
| Saturday, December 14th, 2002 | | Signed free agent CF Éric LaFrance to a 3-year contract worth a total of $2,130,000. | | Signed free agent 3B Gong Kun to a minor league contract. |
| Sunday, December 8th, 2002 | | Signed free agent LF Rémi Rey to a minor league contract. |
| Saturday, November 23rd, 2002 | | SP Davey Acheson received a 1-year contract through automatic renewal worth a total of $300,000. | | CL Paul Hogan received a 1-year contract through automatic renewal worth a total of $300,000. | | LF Vince Valiant received a 1-year contract through automatic renewal worth a total of $300,000. | | C Roark Dempsey received a 1-year contract through automatic renewal worth a total of $300,000. | | MR David Crocker received a 1-year contract through automatic renewal worth a total of $300,000. | | MR Ross Matthews received a 1-year contract through automatic renewal worth a total of $300,000. | | 3B Silvio Garcia received a 1-year contract through automatic renewal worth a total of $300,000. | | CF Jeff Washington received a 1-year contract through automatic renewal worth a total of $300,000. | | SP Martin Brown received a 1-year contract through automatic renewal worth a total of $300,000. | | MR Norbert Rich received a 1-year contract through automatic renewal worth a total of $300,000. | | SP Tom Sharp received a 1-year contract through automatic renewal worth a total of $300,000. | | SP Pisith Beng becomes a free-agent. | | MR Rodger Murkami becomes a free-agent. | | MR Che Malacara becomes a free-agent. | | MR Ratt Mectenwald becomes a free-agent. | | MR Michael Myrie becomes a free-agent. | | C Donald Koester becomes a free-agent. | | RF Jose Aguirre becomes a free-agent. |
| Wednesday, November 20th, 2002 | | Demoted MR Brian Bibb from Single A Pahrump to Rookie League Roswell. | | Traded 34-year-old right fielder Chuck Adolph to the Birmingham Bandits, getting 24-year-old minor league first baseman Enrico González and 22-year-old minor league starting pitcher Alfonso Castillo in return. | | C Desi Stanley received a 1-year contract through arbitration worth a total of $850,000. | | 3B Jose Oliva received a 1-year contract through arbitration worth a total of $500,000. | | CL Jonathan Salott received a 1-year contract through arbitration worth a total of $1,250,000. | | SP Lorenzo Morales received a 1-year contract through arbitration worth a total of $5,000,000. | | CF Jimmy Slizz received a 1-year contract through arbitration worth a total of $2,420,000. | | MR Francis Linares received a 1-year contract through arbitration worth a total of $2,884,255. | | C Nicolas Kuffrey becomes a free-agent. | | MR Bob Fife becomes a free-agent. | | 2B Philippe LaRouche received a 1-year contract through arbitration worth a total of $1,500,000. | | CF Douglas Howser becomes a free-agent. |
| Friday, November 8th, 2002 | | Signed bench coach Jake Taylor to a 5-year, $480,000 per year contract. |
| Thursday, November 7th, 2002 | | Placed 2B Brent Gates on the active roster. | | Activated 2B Brent Gates from the disabled list. |
| Tuesday, November 5th, 2002 | | Signed SS Donald Noboru to a 4-year contract extension worth a total of $38,000,000. |
| Thursday, October 31st, 2002 | | Placed RF Dan Alston on the Charley Pegler League 10-day disabled list, retroactive to 10/23/2002. |
| Wednesday, October 30th, 2002 | | Bench Coach Jon McNecirty leaves the team, his contract was not renewed. |
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