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03/23/2013 9:33 PM ET

Boxberger sent to Triple-A in latest round of cuts

PEORIA, Ariz. -- The Padres trimmed their roster again on Saturday, moving three players to the Minor League side.

The Padres optioned right-handed pitcher Brad Boxberger to Triple-A Tucson and reassigned infielders Jeudy Valdez and Jonathan Galvez to Minor League camp. Left-handed pitcher Arturo Lopez also was reassigned.

Boxberger, who is on the 40-man roster, had a 4.50 ERA in eight appearances this spring. He allowed four runs on seven hits in eight innings with three walks and nine strikeouts.

Valdez hit .206 with one home run and seven RBIs in 34 at-bats. Galvez hit .375 with a home run and eight RBIs in 40 at-bats.

Lopez had a 1.13 ERA in eight appearances. He allowed one run on five hits in eight innings with four walks and two strikeouts. Lopez is property of the Mexico City Red Devils and likely will return to play for them at some point.

The Padres now have 41 players in big league camp. The team breaks camp Thursday and heads to San Antonio for two exhibition games against the Rangers before moving on to Opening Day on April 1 in New York against the Mets.

Luebke to resume throwing after camp breaks

PEORIA, Ariz. -- When the Padres break camp next week and head to New York to open the season against the Mets, pitcher Cory Luebke will head back to San Diego.

Luebke, who had Tommy John surgery on his left elbow in May, hasn't played catch in about three weeks, though the left-hander isn't viewing it as much of a setback.

"I think we're going to start again next week when I get back to San Diego, I think they're going to revise my throwing program," Luebke said.

Luebke said he'll likely visit team physician Dr. Heinz Hoenecke first to make sure he is clear to resume his throwing program.

"We're giving it a little rest," Luebke said. "It feels good but I've been throwing since November, three times a week. So we're giving it a little time to cool off."

Luebke said that his recent inactivity shouldn't affect his bottom line in terms of when he will be able to pitch in a game again.

"When you look at the protocol, the first 10 1/2 months are pretty set, but after that ... in some cases, it takes guys 12 months and some guys it takes 14 or 16 months."

Until he's told otherwise, Luebke is working under the assumption that he'll be able to pitch sometime this season -- whether that be June or possibly later.

"I would be pretty upset if I didn't," Luebke said. "But that hasn't even crossed my mind yet."

Quentin encouraged after testing knee for six innings

PEORIA, Ariz. -- Left fielder Carlos Quentin is still waiting for a fly ball to head his way this spring, though he was satisfied nonetheless with the six innings he played Saturday in a Minor League game.

Quentin tested his sore right knee again, this time by playing six innings in the outfield. And while he did not get any action, he ran the bases without issue and even slid into second base attempting to break up a double play.

"It was a good way to stop," he said, smiling.

The game, watched by general manager Josh Byrnes and manager Bud Black, was deemed a success by those present.

"That was very encouraging," Black said. "Today was a very positive test."

Quentin has now played in four Minor League games in the past seven days. There's still a chance that he could appear in an exhibition game. The stickler there is if he doesn't, the Padres could backdate a stint on the disabled list -- if needed -- to March 22. If he plays in a Cactus League game or even in one of two games next weekend in San Antonio, the clock restarts.

At this point, though, Quentin sounds determined to play on Opening Day on April 1 against the Mets at Citi Field.

"I was encouraged, even more so in that it didn't feel great this morning but then it got better as I went along," said Quentin, who hasn't had a fly ball hit at him in any of his four Minor League games. "As I ran on it, it started to loosen up."

Worth noting

• Still no game action for infielder Logan Forsythe, who was originally set to play in games this weekend. Forsythe has been sidelined by plantar fasciitis in his right foot and hasn't played in a game since March 7. Forsythe went through a workout Saturday afternoon and manager Bud Black said he could get some at-bats in a Minor League game Sunday and possibly play a few innings in the field.

• The Padres released six players from their Minor League camp Saturday: Right-handed pitchers Mike Broadway, Chris Haney and Mark Pope. Infielder Goose Kallunki and outfielders Anthony Renteria and Kyung-Min Na also were released. Pope was a fifth-round Draft pick in 2011 out of Georgia Tech. He compiled a 5.67 ERA in two seasons.

• Left-hander Clayton Richard threw 92 pitches in a Triple-A game on Sunday. No statistics were made available. Richard will likely pitch the second game of the regular season on April 3 in New York against the Mets.

Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.