SURPRISE, Ariz. -- The Cubs don't have a designated long relief pitcher, but manager Mike Quade will rely on James Russell, Marcos Mateo and Jeff Samardzija for that role.

Quade finalized his bullpen on Saturday, naming Mateo to the last opening. The right-hander was called up last season for the first time, appearing in 21 games and posting a 5.82 ERA.

This winter, he pitched for Estrellas in the Dominican Republic and went 2-0 with a 2.40 ERA in 12 games.

Instead of designating one pitcher, Quade said he expects Russell, Mateo and Samardzija to be able to throw 40 pitches in a game and go at least two innings. Russell and Samardzija have both started in the past.

The other pitchers in the 'pen -- Kerry Wood, Sean Marshall, and John Grabow -- will most likely be used for one inning or a specific situation.

"That's very manageable to me coming out of the chute," Quade said of the setup. "Barring something really going south, I think that works best."

Castillo, M. Ramirez stay in camp as insurance

SURPRISE, Ariz. -- The Cubs still have four catchers in spring camp but are expected to break with Geovany Soto and backup Koyie Hill on the final 25-man Opening Day roster.

They're keeping both Welington Castillo and Max Ramirez because both have been injured, and both are insurance in the final week before the regular season opens April 1.

Castillo has been bothered by a sore right index finger, which limits his ability to throw. He can grip the bat. However, Castillo is expected to open at Triple-A Iowa; the Cubs want him to get more experience calling games.

Ramirez has battled a sore left wrist, and if he does well in batting practice on Sunday, he may get in a game.

In other injury news, infielder Augie Ojeda, who already was assigned to the Minor League camp, had his back spasms flare up again. He's day to day.

Baker to sit out weekend games as precaution

MESA, Ariz. -- Cubs infielder Jeff Baker, who came out of Friday's game with tightness in his left hamstring, will be held out of weekend games as a precautionary measure.

Baker said he felt something in his leg during an at-bat in the Cubs' game against the Mariners. On Saturday, there was still some residual soreness in his hamstring.

"I'll be ready when I need to be ready and get back out there hopefully in a couple days," Baker said. "I'd just like to get this a little better and not have to worry about it going forward."

Baker, who will be sharing playing time at second with Darwin Barney and Blake DeWitt, expected to play Monday when the Cubs travel to Goodyear.