FORMER MET ENJOYING GREEN-ER PASTURES  —  Shawn Green anticipated that it would happen.  Now it's a done deal.  —  The right fielder, who played with the Mets for the last year and a half and spent parts of 15 seasons in the majors, told The Post yesterday that he has retired.

Notes: Schneider learns from teammates  —  Beltran takes new catcher under his wing in training camp  —  LAKELAND, Fla. — Brian Schneider, who along with most Mets regulars didn't make the trip to Lakeland, used the more relaxed atmosphere back at Tradition Field to seek out some friendly hitting advice.

MLB might punish Mets over thin traveling squad … The Mets could be in hot water with the commissioner's office over the traveling squad they took to Lakeland for their spring-training opener Wednesday.  —  Just the day before, MLB's executive vice president for baseball operations …

Zumaya pleased by progress  —  Tigers reliever ahead of schedule after October surgery  —  LAKELAND, Fla. — Joel Zumaya came to camp on Tuesday expecting another day in the weight room.  He ended up throwing a baseball for the first time in almost five months.

Corpas locked, loaded Rockie  —  Colorado and the closer have agreed on a historic deal that could be worth $22 million.  —  TUCSON — Manny Corpas' knack for perfect endings has created the beginning of a long-term relationship with the Rockies.  The Rockies agreed in principle Wednesday …

Matsui prepared to yield to Yankees' needs  —  TAMPA, Fla. - Hideki Matsui wants to play leftfield for the Yankees.  However, they more likely are penciling him in as a designated hitter, at least most of the time.  —  Matsui said yesterday that although he would prefer to be in the outfield …

Milledge rips Mets again  —  LAKELAND, Fla. - From high-fiving fans, to showboating after meaningless home runs, to arriving late at the ballpark more than a few times, Lastings Milledge certainly stirred things up during his brief stay with the Mets.  —  And while he's with the Nationals now …

DeRosa to undergo heart procedure today; expected back soon  —  MESA, Ariz. — Cubs second baseman Mark DeRosa is scheduled to undergo surgery this morning to correct the heart arrhythmia that sent him to a Mesa hospital over the weekend.  And barring a setback, the club expects he'll be ready …

Astros owner Drayton McLane might re-think Roger Clemens' contract  —  KISSIMMEE, Fla. - Houston Astros owner Drayton McLane showed the first signs that having Roger Clemens at spring training may not be worth the headache - especially with the Department of Justice looming in the Rocket's rear-view mirror.

What a switch: fan Batista meets his idol Kenny G  —  PEORIA, Ariz. — His entire winter had been spent front and center on some kind of stage.  —  Miguel Batista hopped around the United States, Ecuador, Panama and his native Dominican Republic, opening baseball parks …

Say No to Johan  —  WHY RED SOX AND YANKEE FANS ARE HAPPY THEY WON'T BE ROOTING FOR THE BEST PITCHER IN BASEBALL.  —  You'd think Yankee and Red Sox fans would be upset about losing Johan Santana to the Mets.  After all, he's the best pitcher in the known universe—and left-handed!

Notes From The Battleground: Roy White Better Than Jim Rice?  —  As Spring Training has yet to really heat up yet, Volume 4 of Notes from the Battleground will take a retrospective look at the Yankee-Red Sox rivalry, going back to the 1970s - the last time the rivalry was as intense as it's been of late.

How cold was it?  —  FORT MYERS - For Terry Francona and David Ortiz, the coolest part - make that the coldest - part of yesterday's Red Sox visit to Washington came on the road.  —  “I froze my (expletive deleted) (body parts) off,” said Ortiz of his ride in the sidecar of the lead motorcycle escort …