Trumbo has battled plantar fasciitis in the foot since Spring Training, and he said it could be because he was compensating for that injury that he wound up with the stress fracture.
Trumbo felt pain from the stress fracture Monday night after he hit a seventh-inning home run.
"We've got to deal with it now," Trumbo said. "Try to get everything healthy and try to get back as soon as possible. I don't have a time frame. I'll have a better idea once I get back to Arizona."
Trumbo had a stress fracture in his right foot that he said took 5 1/2 months to heal during the 2011 offseason, but he said he does not believe this stress fracture is as serious.
"That one took a long time," Trumbo said. "But this one probably should be significantly less."
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.