The following transactions were recorded by the Arizona Diamondbacks for the calendar year 2002.
| December | |
| Date | Description |
| 12/22/2002 | Re-signed first baseman Mark Grace to a one-year contract with a club option for 2004; signed outfielder Mark Little to a one-year contract with an invitation to spring training. |
| 12/16/2002 | Acquired pitcher Elmer Dessens from the Cincinnati Reds as part of a four-team trade. |
| 12/08/2002 | Re-signed outfielder Steve Finley to a two-year contract; offered salary arbitration to pitcher Brian Anderson and first basemen Greg Colbrunn and Mark Grace; declined to offer arbitration to infielder Jay Bell and pitchers Mike Fetters, Rick Helling and Mike Morgan. |
| November | |
| Date | Description |
| 11/09/2002 | Signed infielder Mike Bell to a minor league contract. |
| 11/06/2002 | Picked up the option on the contract of pitcher Mike Myers. |
| October | |
| Date | Description |
| 10/29/2002 | Named Jack Howell hitting coach at Tucson of the Pacific Coast League (AAA); named Scott Coolbaugh manager at El Paso of the Texas League (AA); named Mike Aldrete manager, Mel Stottlemyre Jr. pitching coach and Damon Mashore hitting coach at Lancaster of the California League (A); named Von Hayes manager, Dan Carlson pitching coach and Hector de la Cruz hitting coach at South Bend of the Midwest League (A); named Bill Plummer manager, Jeff Pico pitching coach and Jay Gainer hitting coach |
| 10/07/2002 | The Arizona Diamondbacks declined the options on pitchers Rick Helling, Mike Morgan and Armando Reynoso. |
| September | |
| Date | Description |
| 09/06/2002 | Activated pitcher Greg Swindell from the 15-day disabled list. |
| 09/04/2002 | Purchased the contract of outfielder Felix Jose from Tucson of the Pacific Coast League (AAA). |
| 09/02/2002 | Activated infielder Chris Donnels and pitcher Mike Morgan from the 15-day disabled list; recalled catcher Rod Barajas and pitcher John Patterson from Tucson of the Pacific Coast League (AAA); purchased the contract of outfielder Mark Little from Tucson. |
| August | |
| Date | Description |
| 08/21/2002 | Placed pitcher Greg Swindell on the 15-day disabled list with a lower back strain; recalled pitcher Eddie Oropesa from Tuscon of the Pacific Coast League (AAA); optioned catcher Rod Barajas to Tuscon; recalled infielder Alex Cintron from Tuscon. |
| 08/16/2002 | Acquired outfielder Mark Little from the New York Mets for a player to be named and assigned him to Tucson of the Pacific Coast League (AAA). |
| 08/15/2002 | Placed infielder Craig Counsell on the 15-day disabled list, retroactive to August 9, with a neck injury; activated catcher Damian Miller from the 15-day disabled list. |
| 08/07/2002 | Activated pitcher Rick Helling from the 15-day disabled list; optioned pitcher John Patterson to Tucson of the Pacific Coast League (AAA). |
| 08/02/2002 | Activated infielder Greg Colbrunn from the 15-day disabled list; placed infielder Chris Donnels on the 15-day disabled list with a lower back strain. |
| July | |
| Date | Description |
| 07/26/2002 | Placed catcher Damian Miller on the 15-day disabled list, retroactive to July 24, with a lower back strain; activated first baseman Erubiel Durazo from the 15-day disabled list. |
| 07/24/2002 | Placed pitcher Rick Helling on the 15-day disabled list, retroactive to July 16, with a sprained right ankle; placed first baseman Greg Colbrunn on the 15-day disabled list, retroactive to July 18, with a strained right calf; activated infielder Jay Bell from the 60-day disabled list; recalled pitcher John Patterson from Tucson on the Pacific Coast League (AAA). |
| 07/15/2002 | Purchased the contract of catcher Chad Moeller from Tucson of the Pacific Coast League; designated outfielder Jose Guillen for assignment. |
| 07/11/2002 | Activated third baseman Matt Williams from the 60-day disabled list; optioned infielder Alex Cintron to Tucson of the Pacific Coast League (AAA). |
| 07/06/2002 | Acquired pitcher Mike Fetters from the Pittsburgh Pirates for pitcher Duaner Sanchez. |
| 07/03/2002 | Placed pitcher Todd Stottlemyre on the 15-day disabled list, retroactive to June 27, following right elbow surgery; recalled pitcher Erik Sabel from Tucson of the Pacific Coast League (AAA). |
| 07/01/2002 | Placed first baseman Erubiel Durazo on the 15-day disabled list, retroactive to June 30, with a strained right oblique muscle; recalled infielder Alex Cintron from Tucson of the Pacific Coast League (AAA). |
| June | |
| Date | Description |
| 06/27/2002 | Activated pitcher Matt Mantei from the 60-day disabled list; optioned pitcher Duaner Sanchez to Tucson of the Pacific Coast League. |
| 06/26/2002 | Activated infielder Junior Spivey from the 15-day disabled list; optioned infielder Alex Cintron to Tucson of the Pacific Coast League (AAA); signed infielder Sergio Santos, their 2002 first-round draft pick, and assigned him to Missoula of the Pioneer League (Rookie). |
| 06/25/2002 | Activated pitcher Todd Stottlemyre from the 15-day disabled list; placed pitcher Mike Morgan on the 15-day disabled list with a bruised left knee. |
| 06/17/2002 | Signed catcher Christopher Snyder and pitcher Jared Doyle. |
| 06/14/2002 | Placed infielder Junior Spivey on the 15-day disabled list, retroactive to June 10, with a strained right hamstring; recalled pitcher Duaner Sanchez from El Paso of the Texas League (AA). |
| 06/05/2002 | Optioned pitcher Eddie Oropesa to Tucson of the Pacific Coast League (AAA); recalled pitcher Mike Koplove from Tucson. |
| May | |
| Date | Description |
| 05/25/2002 | Placed outfielder Danny Bautista on the 15-day disabled list with a torn labrum in his left shoulder; activated outfielder David Dellucci from the 15-day disabled list. |
| 05/16/2002 | Activated first baseman Erubiel Durazo from the 15-day disabled list; optioned infielder Alex Cintron to Tucson of the Pacific Coast League. |
| 05/08/2002 | Optioned pitcher Erik Sabel to Tucson of the Pacific Coast League; recalled infielder Alex Cintron from Tucson. |
| 05/04/2002 | Placed outfielder Dave Dellucci on the 15-day disabled list with a strained left hamstring; activated infielder Danny Klassen from the 15-day disabled list. |
| 05/01/2002 | Optioned pitcher Bret Prinz to Tucson of the Pacific Coast League (AAA); purchased the contract of pitcher Jose Parra from Tucson. |
| April | |
| Date | Description |
| 04/10/2002 | Activated pitcher Todd Stottlemyre from the 15-day disabled list; designated catcher Chad Moeller for assignment. |
| March | |
| Date | Description |
| 03/30/2002 | Purchased the contract of pitcher Eddie Oropesa, infielder Chris Donnels and outfielder Quinton McCracken; placed pitchers Armando Reynoso and Matt Mantei and third baseman Matt Williams on the 60-day disabled list; placed infielder Jay Bell, first basemen Greg Colbrunn and Erubiel Durazo and pitchers Todd Stottlemyre and Greg Swindell on the 15-day disabled list. |
| February | |
| Date | Description |
| 02/18/2002 | Agreed to terms with RHPs B.J. Bevis, Mike Koplove, John Patterson and Jose Valverde, INFs Danny Klassen and Lyle Overbay and OF Luis Terrero. |
| 02/14/2002 | Named Chili Davis minor league hitting instructor for Spring Training. |
| 02/08/2002 | Agreed to terms with C Damian Miller on a one-year contract. |
| 02/01/2002 | Signed P Miguel Batista to a two-year contract. |
| January | |
| Date | Description |
| 01/19/2002 | Signed free-agent RHP Rick Helling to a one-year contract with a mutual option for 2003. |
| 01/15/2002 | Named Jack Howell and Dan Carlson to minor league coaching staff. |
| 01/11/2002 | Invited LHPs Troy Brohawn, Horacio Estrada, Eric Knott, Eddie Oropesa, Yorkis Perez and Stephen Randolph, RHPs Jason Bulger, Jonathan Johnson, Jose Parra and Erik Sabel, Cs Brad Cresse and Willie Morales, INF/OF Chris Donnels and OF Quinton McCracken to Spring Training. |
| 01/09/2002 | Agreed to terms with 2B Craig Counsell on a three-year contract extension with club options for 2005 and 2006. |
| 01/07/2002 | Acquired LHP Mike Myers from the Colorado Rockies in exchange for OF Jack Cust and C J.D. Closser. |
| 01/03/2002 | Agreed to terms with P Mike Morgan on a one-year contract. |
| 01/02/2002 | Named Chuck Kniffin pitching coach. |
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