Guillen had more than a little bit of passing interest, since he managed the right-hander last year.
"This guy went through a lot of ups and downs, more down than up," Guillen said. "Last year, he pitched great. He pitched very good. He was better than people thought. I'm very excited. He earned it."
Humber was a first-round pick of the Mets -- third overall -- in the 2004 First-Year Player Draft, but he never really broke through until last year with the White Sox. He went 9-9 with 3.75 ERA in 28 games, 26 of which were starts.
That was the first time Humber made more than one start in a season.
Guillen also saw Mark Buehrle -- now with the Marlins -- throw a perfect game for the White Sox vs. the Rays on May 23, 2009. The skipper said that effort still makes him shake his head.
"Buehrle is a contact pitcher," Guillen said. "That's why I think that's the most amazing thing I've ever seen."