Guzman, who last faced hitters in September 2009, was able to throw all his pitches -- fastball, changeup and cutter. He isn't ready to pencil himself into the Cubs' plans for 2011 just yet. It's a long process.
"I still need to throw more," Guzman said.
"Miracles can happen," Cubs manager Mike Quade said Tuesday. "Let's see if he can't get healthy and get back throwing the way he did."
Guzman has been limited to 88 games in four seasons because of arm injuries. In 2009, he totaled 61 innings over 55 games and compiled a 2.95 ERA.