The White Sox could return to a five-man rotation, with Phil Humber as the odd-man out. Humber has the lowest ERA among Chicago's starters (2.85), but he could move to the bullpen as the team trims the rotation. "We have to know if this guy can pitch out of the bullpen, how long it will take to get loose," manager Ozzie Guillen said. "There are so many things to go over with [pitching coach Don Cooper] to see about who is the best guy to go there. If Humber has to go there, that’s the way it is. We talk about a few players." Humber has 24 relief appearances in the majors.