NEW YORK -- Second baseman Luis Castillo remained out of the Mets' starting lineup with a bone bruise in his left foot Sunday, one day after the injury forced him to leave Saturday's game in the seventh inning.

Castillo met with the Mets' training staff Sunday in an effort to find an orthopedic insert that will limit his discomfort.

"I've been using one, but it doesn't do anything," said Castillo, who was sporting an insert in his left sandal after the game. "So we'll try something better."

Despite the pain, Castillo entered Sunday's game as a defensive replacement after manager Jerry Manuel pinch-hit for second baseman Alex Cora in the seventh. Castillo singled in his lone at-bat and reported a fair bit of discomfort after the game.

He entered only because the Mets had no other viable middle-infield options.

"We didn't have any more players, man," Castillo said. "And I play for the team."

Though Castillo can trace the roots of his injury back to Spring Training, he aggravated it by making a hard turn around first base in the seventh inning Saturday. Castillo remains day-to-day.

"I've had this for a long time," Castillo said. "Some days I feel good. Some days I feel worse."

Manuel believes the injury is a byproduct of the knee troubles that have dogged Castillo in recent years. Castillo had right knee surgery following the 2007 season.

"He's had some issues with his knee, and that's probably something that has taken its toll over time," Manuel said. "You try to protect one area and you hurt something else."

Mets to discuss Perez's future

NEW YORK -- Oliver Perez's rotation spot may not be in jeopardy yet. But it's getting there.

After Perez walked a season-high seven batters, hit another and threw a wild pitch in 3 1/3 innings Sunday, Mets manager Jerry Manuel said he would discuss Perez's rotation spot this week.

"Those are some things that we'll have to reflect on," Manuel said. "We have to take everything into consideration as we contemplate and chew on it, marinate on it and see where we are."

A change, however, does not appear imminent.

"We will have to talk about it, reflect on it," Manuel said. "But as I sit here right now, I don't see us at this time making any changes."

If the Mets do decide to make a move, they could call on Hisanori Takahashi, who has been stellar in long relief for the Mets. Or they could tab knuckleballer R.A. Dickey, who has a 2.56 ERA for Triple-A Buffalo and recently threw a complete game one-hitter.

Perez, though, seems likely to receive at least one more chance. And he is determined to improve upon his 0-2 record and 4.50 ERA, mostly the product of 26 walks in 30 innings.

"I know what I have to do," Perez said. "This is not going to happen again."

Mets nearly hampered by Wright's ejection

NEW YORK -- David Wright was ejected for arguing balls and strikes in the ninth inning Sunday, sparking a chain of events that nearly forced the Mets to use Jonathon Niese in left field and Jason Bay at third base.

After taking a called third strike from Giants closer Brian Wilson for his fourth strikeout -- and second called strikeout -- of the game, Wright whirled on his heel and immediately began arguing with home-plate umpire Paul Schrieber, who promptly ejected him.

"It was a disagreement" was Wright's only comment.

Wright has now struck out in eight consecutive at-bats dating back to the eighth inning Friday, with two walks and a sacrifice fly -- not considered official times at bat -- during that span.

"There's some frustration, I'm sure, but that's all part of the fight," Mets manager Jerry Manuel said. "I don't think he would have done that knowing all the things that surrounded it. But that's just part of the fight sometimes. We lose our cool."

Manuel was referencing the fact that had the Mets tied the game in the ninth, they would have had no position players left on the roster to replace Wright. Though Manuel said he didn't know what he would have done in that situation, several players revealed that Manuel already had a contingency plan in place.

Had the Mets forced a 10th inning, Bay -- a college third baseman -- would have moved to third and starting pitcher Jonathan Niese would have played left field.

Niese, who last played the outfield in high school, said Manuel told him to get ready to enter the field for the 10th.

"So I was getting ready," Niese said.

Bay, who played third base for Gonzaga, might not have been the only option, however. Center fielder Angel Pagan, who played shortstop regularly as a teenager, said he was considering offering up his services at third.

"I can still do it a little bit," Pagan said. "If they put me in there, I would have tried to do the best I could. I'd knock the balls down with my chest or something."

Bajaras back in Mets' lineup

NEW YORK -- One day after Henry Blanco replaced him -- and outshined him -- in a walk-off victory Saturday, injured catcher Rod Barajas returned to the Mets' lineup against the Giants.

Barajas, who suffered a left index finger bruise when Eli Whiteside's bat smacked him in the mitt on a catcher's interference play Friday, could grip a bat Sunday and swing without issue.

"We felt even yesterday that he could play, but we didn't want to have any setbacks with that type of thing," Mets manager Jerry Manuel said prior to Sunday's game. "I feel pretty good about him."

Even Friday, the pain did not affect Barajas too much. Feeling he would be able to take one good swing before his finger went numb, Barajas sat on a Sergio Romo slider and hit it over the wall for a walk-off home run.

Subbing for Barajas the following day, Blanco followed suit with a walk-off homer of his own in the 11th. According to the Elias Sports Bureau, that marked the first time in Major League history that a team's catchers -- either the same or different catchers -- had hit walk-offs on consecutive days.

After Sunday's game, though, Barajas reported a bit of discomfort behind the plate, particularly on pitches that forced him to rotate his glove thumb-side up. His left index finger, though no longer discolored, remained noticeably swollen.

"It's like you have a bruise and 220 times a game, somebody walks up and pushes it," Barajas said. "I felt it pretty much the whole game. But it's what we do."