The Brewers are prepared to play without injured ace Ben Sheets for at least another four weeks, Brewers general manager Doug Melvin said Tuesday. "I'm focusing [on being] without Ben Sheets for the next four weeks," Melvin said before the Brewers-Phillies game at Miller Park. "If he's back sooner, then it's a bonus to us. If he's not back in four weeks, then we'll evaluate it at that time. ... We don't know, the doctors don't know, Ben doesn't know right now."