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WAUKEE -- Starter Marco Estrada left Wednesday's game against the Giants with a strained right hip flexor in the bottom of the first inning and will undergo an MRI to determine the extent of the injury.
The right-hander began limping as he rounded first after hitting a two-run double and grabbed at the leg upon reaching second base. He thought that the line drive hit toward third base was going to be caught, and when it wasn't, he accelerated and sustained the injury.
"I almost wish I would have struck out on that," Estrada said after the Brewers won, 8-5.
Though trainers told him he'd injured the hip flexor, Estrada said he felt a "pop" in his quad as he ran to first. He's not sure how he made it all the way to second.
The severity of the injury won't be known until after the MRI, but manager Ron Roenicke said it doesn't appear to be a slight issue.
"He was hoping it would go away, but it didn't go away," Roenicke said. "He strained it, I just don't know how bad."
Estrada's next scheduled start is for Tuesday, against the Dodgers in Los Angeles. If he won't be available, Roenicke said, one of the options will be to start left-handed reliever Manny Parra, who replaced Estrada on Wednesday. Roenicke said that Parra won't pitch in the next couple of games, also because he's been used often as of late.
"We'll see if we can cover some innings until that start," Roenicke said. "And then that start, either we'll bring somebody [up] or make sure that we've got somebody in behind Manny that can give us some length."
Inserted into the rotation on April 21 after a torn left rotator cuff ended Chris Narveson's season, Estrada was looking for his first win, and he retired the Giants in order in the top of the first.
Roenicke said that Estrada had battled a neck issue two or three starts ago and a back problem in his previous start but felt fine on Wednesday.
"I was pretty excited the way he threw the first inning, and then all of a sudden, we lose him," Roenicke said. "It's disappointing."