NEW YORK -- Angel Pagan left Wednesday's 5-0 win over the Tigers in the seventh inning with spasms in his right side. He is day-to-day and likely won't play Thursday, but shouldn't miss much time.

"I couldn't swing the bat hard, so I just wanted to be a little bit smart in that situation and maybe not miss more time," Pagan said. "This is going to be a day-to-day situation, and we'll see what happens."

After feeling a bit of discomfort in his midsection during batting practice, Pagan applied a heat pack to his right side prior to the game. But the problem reoccurred when he swung and fouled off a ball in the fifth inning against the Tigers.

Pagan played two more innings in the field before giving way to pinch-hitter Jesus Feliciano in the bottom of the seventh.

"I thought it would be best to take him out," manager Jerry Manuel said. "I'll probably give him a day off [Thursday] just to regroup."

Leading the Mets with a .302 batting average this season, Pagan also has a lengthy injury history that includes stints on the disabled list in each of the past two seasons. This year, he has finally managed to avoid the DL, filling in for the injured Carlos Beltran in center field.

"It's not going to be anything that's going to take a long time," he said of this latest injury. "But in a situation like this, with the way we're playing, you've got to be smart sometimes. You don't want to lose a lot of time and probably hurt the team."

Mets to decide on new plan for Maine

NEW YORK -- A second opinion on John Maine's ailing right shoulder Tuesday confirmed the original diagnosis of right shoulder tendinitis. Maine has suffered no structural damage in the shoulder.

With that news in mind, Mets general manager Omar Minaya, manager Jerry Manuel and pitching coach Dan Warthen will convene later this week to determine a new plan for Maine.

"I don't think it's anything serious," Manuel said. "It's a matter of restructuring his workload, that type of thing."

After Maine complained of discomfort following his 4 1/3-inning, 88-pitch rehab outing in Triple-A Buffalo last Friday, the Mets shut him down indefinitely. On the disabled list since May 21 with what the Mets have termed everything from "right shoulder weakness" to "right rotator cuff tendinitis," Maine has been unable to throw consistently over 90 mph.

Though he did not allow any runs in two rehab appearances, Maine did walk five batters in 8 1/3 innings.

Following his start in Buffalo, Maine sought a second opinion from a doctor not affiliated with the Mets. That examination took place Tuesday.

A 15-game winner and a key rotation member for the Mets in 2007, Maine has gone 18-17 since that time, posting a 4.55 ERA.

Niese OK despite post-rain struggles

NEW YORK -- Though Jon Niese struggled mightily after a 58-minute rain delay in Tuesday's game, he returned to Citi Field on Wednesday feeling no ill effects from the outing.

"He came in today and said he really felt good," Mets manager Jerry Manuel said. "Normally after a start, he's physically a little beat up."

After allowing all seven of his hits and all six of his runs following the delay, Niese -- who spent Wednesday afternoon running laps around the Citi Field warning track -- noted that he could not generate the proper movement on his pitches following the delay.

If a similar situation arises again in the future, the Mets may not allow Niese to remain in a game following such a lengthy delay. Though Niese did his best to stay warm during the delay, riding a stationary bike and throwing a short bullpen session, he was not the same pitcher after returning to the mound.

"Maybe he's not a guy that you sit that long," Manuel said, "and then come back to try to finish a couple innings."

Worth noting

Second baseman Luis Castillo (bone bruise in right heel) is "still mending" at the team's Spring Training complex in Port St. Lucie, Fla., according to Mets manager Jerry Manuel. Castillo has no timetable to begin a Minor League rehab assignment. ... The Mets signed 37-year-old right-hander Ramon Ortiz to a Minor League deal, assigning him to Triple-A Buffalo. Ortiz, best known for his six years in the Angels' rotation, last pitched for the Dodgers earlier this season. ... The first 20,000 fans at Citi Field on Wednesday received a "Make Wright #1" foam finger, in a promotion to encourage fans to vote David Wright into the 2010 All-Star Game in Anaheim.