But Viciedo is considered an outfielder more than a third baseman, at this point, and with McPherson hitting from the left side, he can slide into the third base/first base utility role temporarily vacated by Teahen's injury. Viciedo is hitting .315 with five home runs, 32 RBIs and a .321 average against right-handed pitchers, but manager Ozzie Guillen wants Viciedo to remain playing every day.
"There's no reason why you call him up and then you have to sit him down," Guillen said. "You have to open a spot. The way we're playing, I think we should keep the ballclub the way it was.
"As soon as Viciedo is here, I think he's here for good. To pinch-hit or play once a week, that's kind of hard for us and for him."
Teahen took batting practice and still felt uncomfortable, so the move to the disabled list was made. With McPherson's arrival, Omar Vizquel could be used at second by Guillen to spell Gordon Beckham, who was hitting .217 entering Tuesday's start.
"Well, if you're talking about struggling, I might replace a few guys," Guillen said. "[Alex] Rios still is struggling, Juan [Pierre] is struggling right now, Gordon is still struggling.
"You have to be patient and show a little confidence and a little hope for those guys. The best thing you can do is just keep playing and see what happens. Having McPherson here can help us to get Gordon a day off. The way Omar is swinging the bat, I want to use him the most I can."