The Diamondbacks signed manager Kirk Gibson to a two-year extension with a club option for 2013, reports MLB.com's Steve Gilbert. Additionally, he tweets that former interim GM Jerry Dipoto will become the senior vice president of scouting and player development under new GM Kevin Towers. As first noted by the Arizona Republic's Nick Piecoro on Twitter, only Matt Williams (first base) and Glenn Sherlock (bullpen) will remain on Arizona's coaching staff. Bo Porter (bench) and Jack Howell (hitting) were let go, while Mel Stottlemyre Jr. (pitching) and Joel Youngblood (third base) were offered other jobs in the organization.
The Diamondbacks posted a 34-49 record under Gibson this year; he took over for A.J. Hinch while Dipoto succeeded Josh Byrnes. Dipoto engineered the trades of Dan Haren, Edwin Jackson, Chad Qualls, and Chris Snyder in July.
