"They'll call and talk to Dr. [William] Raasch," Roenicke said, referring to the Brewers' head physician. "We'll see."
The Brewers just optioned Weeks' backup, Scooter Gennett, to Triple-A Nashville on Tuesday night to make room for Wednesday starting pitcher Marco Estrada. Usually, a player must spent at least 10 days in the Minor Leagues before he's eligible to return, but that restriction is waived in the event he takes the place of a teammate placed on the DL.
On an eighth-inning groundout to third base, Weeks stumbled over his bat as he sprinted toward first base, then fell face-first to the grass short of the bag. He was immediately met by Brewers assistant athletic trainer Dave Yeager and Roenicke, who helped Weeks to the dugout.
Weeks was not certain that the stray bat caused his injury.
"Some people say I maybe was trying dodge the bat," he said. "I felt like a little pop or something like that. They think it's a pulled hamstring."
Jim Henderson missed two weeks in late May and early June with a strained right hamstring, Estrada missed two months with a strained left hamstring, and right-hander Yovani Gallardo is currently on the DL with a strained left hamstring.
Weeks was not sure what to expect. He said he'd never suffered a hamstring injury.
"First time ever," he said.
Adam McCalvy is a reporter for MLB.com. Read his blog, Brew Beat, and follow him on Twitter at @AdamMcCalvy. This story was not subject to the approval of Major League Baseball or its clubs.