"Nope," said Guillen when asked if he thought Quentin would return this year. "I don't want to hurt Carlos' feelings, because I know when everybody gets to the postseason, everybody wants to be part of that. I respect his work habit, the way he goes about his business, but it's not going to be easy.
"If he thinks he's going to take batting practice, and all of a sudden be playing, I don't know about that one. At least we send him to the instructional league, give him some at-bats out there [in Arizona]. He's not going to jump from the cage to the lineup.
"I don't think it's fair to him. I don't think it's fair to the ballclub, that's my opinion," Guillen added. "Maybe our coaching staff or [general manager] Kenny [Williams] says, 'No, put him out there.' Then we see what happens. But nobody is that good, to come from rehab to play right away without seeing a ball."
Guillen says he has not talked to any doctors about Quentin's improvement or ongoing rehab program. He also wouldn't completely rule out Quentin making the playoff roster if the White Sox reach either or both of the next two rounds of competition.
It's just not going to be easy for Quentin to convince the White Sox manager.
"You just got injured," said Guillen of Quentin, whose breakout 2008 season included 36 home runs and 100 RBIs. "When you get a pin in your body and you're going to hit, that's why I say I don't expect him to play until next year in Spring Training.
"He has to be ready because if something happens, I got to be prepared for that. Who wouldn't want to have Carlos in the lineup? But it's not going to be easy."
Scott Merkin is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.