NEW YORK -- Under their new regime, the Mets have held their charges accountable throughout the early portion of this season, shipping out players such as Blaine Boyer, Brad Emaus and D.J. Carrasco following streaks of poor performance.

Add two more to that list.

The Mets optioned reliever Ryota Igarashi and outrighted infielder Chin-lung Hu to Triple-A Buffalo early Tuesday morning, activating right-hander Pedro Beato from the disabled list and recalling middle infielder Ruben Tejada from Buffalo. The latter move was in part a reaction to David Wright's back injury; the former was based entirely upon performance.

"Given the fact that we're without the two corners in our infield, we need some more consistent offense off the bench," general manager Sandy Alderson said. "And ultimately we need someone who can play second base on a regular basis."

That somebody is Tejada, 21, who made his Major League debut with the Mets last season and was batting .267, with three home runs in 39 games at Buffalo. Widely considered to be Jose Reyes' eventual heir at shortstop, Tejada will instead play second base, allowing Daniel Murphy to start at first base and Justin Turner to shift over to third in the absence of Wright. The Mets also plan to recall corner infielder Nick Evans from Buffalo on Tuesday to shore up their bench.

The Mets initially kept Hu, a career .177 hitter, on the team for his superlative defense. But Hu's struggles, along with Turner's strong play at several positions, forced them to reconsider his roster spot.

Poor performance was also the rationale behind outrighting Igarashi, the losing pitcher in Monday's game. Bouncing between New York and Buffalo throughout the past year, Igarashi allowed runs in each of his final two games with the Mets.

"I completely understand the decision," Igarashi said through an interpreter. "I've given up a lot of walks recently and I've given up some runs, so I understand the decision."

The Mets were eager to activate Beato, their most consistent reliever in April. Prior to landing on the disabled list with a bout of right elbow tendinitis, the rookie Beato had not allowed an earned run over his first 17 big league innings.

Optimistic Davis set to begin rehab on ankle

NEW YORK -- Ike Davis was no longer walking with a heavy limp Monday, nor sporting a heavy plastic boot on his left foot. Briefly reuniting with his teammates at Citi Field, Davis was scheduled to fly down to Florida on Monday evening to begin his rehab from a sprained left ankle, with the goal of returning to the Mets when he is eligible on May 26.

"He told me he'll be ready on the 26th," manager Terry Collins said. "But only time will tell. Once he starts resuming his baseball activities, we'll see how that ankle responds."

After the ankle began healing and the fears of a more serious injury subsided, Davis became confident in a speedy return following his infield collision with David Wright last week. The first baseman said Monday that he is "going to be playing for sure" when he is eligible to come off the DL next week in Chicago, and Collins expressed similar optimism. "Being in your apartment by yourself all day is not fun," Davis said.

His next step involves a rehab program at the team's Spring Training complex in Port St. Lucie, Fla., which may or may not include Minor League games.

Given that Wright appears headed to the disabled list with his own back injury, Davis' speedy recovery has become even more important for the Mets, who need his thump in the middle of their lineup. Prior to the injury, Davis was hitting .302 with seven home runs and 25 RBIs.

"I knew it wasn't that bad," Davis said of his injury. "I just don't like missing time. It's not what I'm here to do."

Mejia, Young undergo respective arm surgeries

NEW YORK -- The Mets' starting pitching depth officially took two hits Monday, when both Chris Young and Jenrry Mejia underwent surgeries on their right arms.

As expected, Mejia underwent Tommy John surgery Monday morning to replace a torn MCL in his right elbow. Young underwent an operation to repair both a torn anterior capsule in his right shoulder and fraying in his rotator cuff. Both are out for the season.

For Mejia, the rehabilitation is straightforward: the prevalence of Tommy John operations throughout baseball makes it almost certain that he should return to full strength in 12-18 months. The future is less clear for Young, whose age (31) and lengthy injury history have conspired to put his career in question. Johan Santana, who is two months older than Young, underwent an almost-identical procedure last September and is due back around midseason -- but Santana does not have nearly the same history of arm trouble.

"Even if age is an issue, velocity is not for someone like Chris Young," Mets general manager Sandy Alderson said. "It's conceivable that given the same timeline and given the style of pitching, that Chris would have an excellent opportunity to come back and pitch."

Young, who will still collect the $1.1 million guaranteed portion of his one-year contract, was the team's top pitcher prior to the injury, posting a 1.87 ERA in four starts. Mejia, 22, was 1-2 with a 2.86 ERA at Triple-A Buffalo.

The Mets have already tabbed Dillon Gee to replace Young in the rotation. But the organization has few viable starting pitchers left at the upper levels of the Minors, meaning another injury to a starter could be critical.

Mets Minor Leaguer Ramirez suspended

NEW YORK -- Major League Baseball announced Monday that Minor League right-hander Edgar Ramirez has received a 50-game suspension after testing positive for Methylhexaneamine, a performance-enhancing substance, in violation of the Minor League Drug Prevention and Treatment Program.

Ramirez, 27, was 0-2 with a 4.97 ERA in nine appearances (two starts) for Double-A Binghamton prior to the injury. His suspension is effective immediately.

Worth noting

• In what has become a personal catcher situation, Ronny Paulino started behind the plate Monday for the third straight game that Mike Pelfrey has pitched. Entering Monday's play, Pelfrey had produced a 9.56 ERA in four games throwing to regular catcher Josh Thole and a 2.51 mark in two games with Paulino.

• The Mets walked five times in Sunday's game and now lead the Majors with 156 walks. Their pitching staff has also walked 147 batters, second most in the big leagues.