The White Sox depart Arizona with their Opening Day roster set, but without a regular closer.
Manager Robin Ventura said the decision could be revealed on Opening Day. Candidates he has mentioned are 2010 All-Star Matt Thornton, rookies Addison Reed and Hector Santiago, or Jesse Crain, who dealt with a strained oblique this spring.
"I will know and they will know," Ventura said. "I don't really feel the need to tell everybody and make a statement about it."
One thing that was announced is the final bullpen spot, which will be filled by rookie Nate Jones.
"[He] didn't necessarily have a spot when you visualize it, and all of a sudden you go through spring and you see how he's progressed and done things. Those are the good surprises," Ventura said.
The White Sox will play two exhibition games against the Astros on Tuesday and Wednesday in Houston.