"It depends on what we need to do," Guillen said. "We need a young guy. There are so many things we need to figure out, is what we need."
"It's so many different things we can do about it. We can put [Tony] Pena in another inning, or we could pick this kid or send this kid down. We got a couple things to play with, and we're going to do what's better for the ballclub."
Early speculation is that White Sox prospect Daniel Hudson will be called up for the start, on account of the fact that the White Sox pulled him out of the Futures Game on Sunday. Guillen mentioned Hudson by name, but only as an option that will be explored.
In the immediate aftermath of Peavy's injury, the White Sox called up Jeffrey Marquez, a starter with Charlotte.
A bullpen day might be the most logical conclusion, with the three-day All-Star break coming up. In fact, Guillen joked about starting Pena, who has had some extended long-relief outings earlier this season. The only certainty, however, is that whoever trots out to the mound on Sunday is in the White Sox organization right now.
"I think you got to stay in the organization," Guillen said. "You don't just pull up the magic thing and make a trade. That's not easy. When you go into the trade market, there's a lot going on. I think you've got to stay in the organization. Who it's going to be? I don't know who's down there or who's ready to pitch that day."