Garza said he wished Zambrano good luck with the Marlins.
"I'd love to be compared to Zambrano on the field," Garza said Sunday of the right-hander, who was dealt to the Marlins on Jan. 5 for Chris Volstad. "That guy, I'll tell you what, he's going to have one hell of a year, I kid you not. He's going to go down to Miami and surprise a lot of people. His stuff is so electric, and it still bottoms out -- every pitch does.
"I wouldn't be surprised to see him in the Cy Young race this year, I kid you not. He's got that good of stuff. Just playing with Ozzie [Guillen] and being in his own comfort zone, I think he'll have a hell of a season. I wish nothing but the best for that guy."
Asked if he'd noticed any significant changes now that Theo Epstein was in charge as president of baseball operations, Garza said the menu has improved.
"We've got better cooks," he said. "The food was good last year, but they brought in a complete overhaul of the kitchen.
"You see changes there, you see a lot more young faces," Garza said of the clubhouse, not the kitchen. "I've only been here for a year, and that's all I've seen so far. I'm waiting like everybody else to get out there and see what we've got."
Garza posted a 7-4 record in 19 games against the Red Sox when Epstein was in charge there. His impressions of Epstein's teams?
"[I know] I was able to [whip] them every year, year in, year out for three seasons, that's what I learned," Garza said, smiling. "The ballclubs he built were always good."
In January, Garza avoided arbitration and agreed to a one-year contract, but general manager Jed Hoyer said Saturday they may discuss a multi-year deal. Garza doesn't intend on setting a deadline.
"Right now, my agent knows where I'm at and where I want to be at, and that's all there is to it," Garza said. "When stuff comes across, we'll all know about it and we'll talk about it. If something gets done, you guys will know. If nothing gets done, we'll all know. You won't hear a peep from me. My job is to get ready April 5 and get to the postseason."
Garza was the subject of trade rumors this offseason. Cubs manager Dale Sveum cringed each time he heard them.
"When you've got an arm and a competitor like that and a guy who works that hard and the character he brings to the ballclub, that's the kind of guy a manager wants to see somebody give a long-term contract to, not trade," Sveum said.
The right-hander is one of the Cubs' biggest cheerleaders on days he's not starting.
"Watching him over the years in Tampa Bay, to see him compete in the playoffs and World Series, to see what he did there, you knew there was something special with the stuff and that inner cockiness that he has," Sveum said. "Then watching him from the other side of the dugout, you see a guy who's involved the other four days he doesn't pitch. He reminds me a little bit of David Cone. When David Cone didn't pitch those four days, he was the first guy to maybe yell at the other team and irritate the other team a little bit.
"[Garza] has that wound-up personality that he can't sit still. He wants to win, even the four days he's not pitching, which is a huge asset."