Per the JS Online :
The Brewers replaced Weeks on their roster with infielder/outfielder Joe Dillon, who was batting .317 at Nashville with team highs of 20 home runs and 73 RBI. Dillon, who will be 32 on Thursday, is a 10-year professional who has played only 27 games in the major leagues.
Maybe with Cameron back, maybe the thinking is that Cam can lead off while Rickie gets his swing figured out. That would make sense: Cameron comes a lot closer to passing for a leadoff hitter than anyone else we have (other than maybe Corey Hart).