Arizona Diamondbacks manager Bob Melvin, left, takes the baseball from pitcher Brandon Webb, right, as Webb leaves during the fourth inning...

Arizona Diamondbacks manager Bob Melvin waits out a rain delay during a baseball game against the Pittsburgh Pirates in Pittsburgh, Thursday...

Apr. 6, 2009; Phoenix, AZ, USA; Arizona Diamondbacks manager Bob Melvin against the Colorado Rockies during opening day 2009 at Chase Field

...run against the Chicago Cubs with teammates Chris Young, top right, Felipe Lopez, middle, and manager Bob Melvin in the third inning of a baseball game, Wednesday, April 29, 2009, in Phoenix. (AP Photo...

SAN FRANCISCO - SEPTEMBER 10: General manager Bob Melvin #3 of the Arizona Diamondbacks stands in the dugout before the game against the San Francisco...

Arizona Diamondbacks manager Bob Melvin, left, takes the baseball from pitcher Brandon Webb, right, as Webb leaves during the fourth inning...

...press conference at Chase Field in Phoenix, Arizona on November 14, 2007 after D-backs Manager Bob Melvin was named the 2007 NL Manager of the Year . (Photo by Jonathan Willey/Arizona Diamondbacks/MLB...

May 28, 2007; Philadelphia, PA, USA; Arizona Diamondbacks manager Bob Melvin in the dugout during the third inning against the Philadelphia Phillies at Citizens Bank Park in...

...12, 2007; Phoenix, AZ, USA; Arizona Diamondbacks pitcher (47) Jose Valverde hands the ball to manager Bob Melvin after loading the bases and walking in a run in the 11th inning against the Colorado...

Bob Melvin watches the Mariners lose Sunday, their 99th defeat in a bad season that cost the second...

Mariners manager Bob Melvin talks with head groundskeeper Bob Christofferson after some of Safeco's lights went out Wednesday

Manager Bob Melvin of the Seattle Mariners argues a call with umpires during the fourth inning against the Oakland...

PEORIA, AZ - FEBRUARY 19: Manager Bob Melvin #3 of the Seattle Mariners poses for a portrait during the Mariners' spring training Media Day...

Bob Melvin, left, was Arizona's bench coach the past two seasons

Bob Melvin was Arizona's bench coach the past two seasons