Luis Valbuena has been sent for an MRI on his sore left hamstring.
Kendall Graveman has been named the Opening Day starter for the Athletics.
Joe Wendle (shoulder) is scheduled to play catch Thursday for the first time in more than a week.
Jhan Marinez has made the Brewers' bullpen.
Andrew Susac has flown to Milwaukee to undergo additional tests on his neck and back.