Brewers left-hander Chris Narveson told reporters, including MLB.com's Adam McCalvy, that he needs season-ending surgery on his pitching shoulder. The operation will repair a partially torn rotator cuff and require between six and nine months of rehab.
The Brewers moved right-hander Marco Estrada to Narveson's spot in the rotation, so they have enough starting pitching for now. Estrada struck out nine over five innings while allowing one run in his first start of the season on Saturday. Wily Peralta, who was recently optioned back to the minor leagues, provides GM Doug Melvin with another internal candidate for the rotation.
Narveson, 30, made 28 starts for the Brewers in each of the past two seasons. He has a 4.67 ERA with 7.4 K/9 and 3.4 BB/9 in 394 2/3 innings as a big leaguer and will be arbitration eligible for the first time this offseason.