Brewers pitcher Marco Estrada will miss three or four starts with a quadriceps injury. (Mike McGinnis/Getty Images)

Milwaukee Brewers starting pitcher Marco Estrada will miss his next three to four starts with a strained right quadriceps suffered in Wednesday’s game with the San Francisco Giants, reports the Journal-Sentinel‘s Brewers Blog.

Estrada hurt his leg trying to stretch out a double in the first inning of Wednesday’s game. The injury was initially diagnosed as a hip-flexor strain.

The 28-year-old right-hander is 0-3  in six starts this season and has a 4.50 ERA in 11 total appearances. Estrada moved into the rotation when Chris Narveson was lost for the season after shoulder surgery. First baseman Mat Gamel and shortstop Alex Gonzalez also have suffered season-ending injuries this year.

Estrada’s injury does not seem as serious. Manager Ron Roenicke said Wednesday that left-handed pitcher Manny Parra is likely to fill Estrada’s spot while he is out, but general manager Doug Melvin said the team still is considering other options as well.

Milwaukee Brewers first baseman Mat Gamel has torn his ACL and is likely done for the season, according to Tom Haudricourt of the Milwaukee Journal Sentinel:

#Brewers GM Doug Melvin confirms Mat Gamel has torn ACL. Probably season ending.

—
Tom (@Haudricourt) May 02, 2012

Gamel suffered the injury in last night’s loss to the San Diego Padres –
when trying to catch a foul ball of the bat of Nick Hundley in the first inning, he ran into the Petco Park wall along the first-base line and twisted his right knee. He was forced to leave the game.

Gamel was just settling into the regular first baseman’s job now, in his fifth major league season — he was hitting .246 with a home run and two doubles in 21 games so far.

“He was getting his chance; he had waited for his chance and opportunity,” Brewers GM Doug Melvin told the Journal Sentinel.