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03/28/11 6:54 PM ET

Zambrano tunes up with final Cactus outing

GOODYEAR, Ariz. -- Carlos Zambrano tuned up for the regular season by pitching five innings against the Indians on Monday and overlooked some plays that weren't made behind him.

"This is Spring Training," said Zambrano, whose next start for the Cubs will count, Saturday at Wrigley Field against the Pirates. "I want to worry about what happens in that little circle. I want to worry about what I do.

"There's nothing I can do when people don't execute double plays or people don't make plays. My job here is to pitch, and not to criticize or do any other thing. Just pitch."

That's a good sign by Zambrano, who missed time last season when he was ordered to undergo anger management therapy.

Zambrano gave up four runs on four hits and five walks against the Indians.

"The most import thing is how I feel, how my arm responds," he said. "So far this Spring Training, my body has responded good. Let's get it on. Let's do what we can do and what we're capable of doing."

Zambrano started the previous six Opening Days for the Cubs, but he is No. 2 this year as Ryan Dempster gets Friday's season opener.

"I had my chance," Zambrano said. "Now it's Dempster's chance, and he deserves it. It doesn't matter. Dempster was pitching for the last two years No. 2 and he did a good job. It's about doing a good job. It's not about who's this guy or what position or number you are in the rotation. It doesn't matter. I'm just going to be there and do my job. That's what I want to do."

What has also changed is the departure of Zambrano's friend and teammate, Carlos Silva, who was released on Sunday.

"It's kind of sad," Zambrano said. "I spoke to him and I was kind of worried. He didn't want to talk about much. I just gave him some good words. I told him just to be confident you'll get another job. I know he can play for another team. I wish him the best, and we will keep in touch."

Marshall enjoying VCU's run to Final Four

GOODYEAR, Ariz. -- That cheering you heard Sunday from the Cubs' clubhouse was Sean Marshall rooting for his alma mater, Virginia Commonwealth University, in the NCAA men's basketball tournament.

VCU upset top-seed Kansas, 71-61, while the Cubs were facing the Rockies on Sunday in a Cactus League game. Marshall commandeered the remote control for the clubhouse television.

"I was flipping in between WGN [TV] and CBS yesterday, and I was the only person in here cheering during our game," Marshall said.

Marshall sent a text message to the VCU athletic director after the game and told him the Cubs were supporting the Rams in this coming weekend's Final Four.

"I told him, 'Keep it up, you're almost there,'" Marshall said. "They've been flying under the radar, but I don't think so anymore."

Marshall attended VCU from 2001-03 and was drafted during his junior year by the Cubs.

Extra bases

The Cubs optioned catcher Welington Castillo to Triple-A Iowa, reducing their spring roster to 26 players. The team is expected to break camp with Geovany Soto and Koyie Hill as the two catchers. The spring roster includes 12 pitchers, three catchers, six infielders and five outfielders. Max Ramirez is the other catcher in camp, and he is out of options. ... Jeff Baker, sidelined with tightness in his left hamstring, will start at second base and lead off on Tuesday when the Cubs play their last Cactus League game against the D-backs. ... Angel Guzman, rehabbing from right shoulder surgery, threw 20 pitches Monday in two-thirds of an inning in a Minor League game in Peoria, Ariz. If there are no setbacks, he will keep pitching every fifth day. ... Blake DeWitt, who has been used exclusively at second base this spring, will play third Tuesday and Wednesday.

Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter@CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.