Stuck in an extended slump, the Arizona Diamondbacks have shuffled their coaching staff.

Torey Lovullo fired hitting coach Darnell Coles and assistant hitting coach Eric Hinske on Thursday. The Diamondbacks have gone 5-30 since May 4.

"I'm not pinning it on one person or one group because we're all in this together," Lovullo said. "But we've seen 40 days of the type of offensive production that wasn't meeting our standards and obviously well below average. We've seen that trend before and I felt like I needed to address that trend."

The Diamondbacks named co-hitting coaches to replace the fired pair. Rick Short was promoted from Triple-A Reno and Drew Hedman was Arizona's run production coordinator.

Arizona general manager Mike Hazen said he still believes Lovullo is the right person to lead the team.

"Ultimately, he and I are going to be judged the exact same way, the wins and losses," Hazen said. "They're not in the position they need to be in right now. No matter what you thought of our season starting off and where you had us pegged, nobody had us pegged at this.

"That's the part we're all grinding through right now."