The White Sox claimed Guerrero off waivers from the Marlins on Friday.

Guerrero averaged 99 mph on his fastball last season, but he did not have much of a clue where it was going as evidenced by a 16.7 percent walk rate. Command and control have always been problems for the 6-foot-8 Guerrero, who turns 29 next month, and the Marlins gave up hope. The right-hander will compete for a bullpen role in spring training.

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