Money not buying happiness for Yankees, Mets  —  The Mets and Yankees have spent a combined $346,874,953 on ballplayers for the 2008 season.  So far, this is what it has gotten them: 12 wins, 13 losses, third place in the National League East and fourth place in the American League East.

METS PUSH BACK PEDRO'S RETURN  —  The pitching help that the struggling Mets could use most - three-time Cy Young winner Pedro Martinez - won't be arriving anytime soon.  —  GM Omar Minaya told The Post the Mets now expect a strained left hamstring to sideline Martinez until at least the middle of May - and possibly into June.

Chamberlain Leaves Yanks to Join His Ill Father  —  ST. PETERSBURG, Fla. — Part of the budding legend of Joba Chamberlain is his close bond with his father, Harlan.  For several games this season, at home and on the road, Harlan Chamberlain has been around the Yankees …

Tribe closer says he ‘had nothing’  —  Joe Borowski doesn't know what's wrong.  One day he feels like he can throw the ball through a brick wall.  —  “The next day, I feel like I'm throwing through water,” said Borowski.  —  Monday night, Borowski should have come to the mound …

Trade hasn't hurt Marlins in standings  —  They're watching the standings in both leagues.  They see that they're in first place and the Detroit Tigers are in last place.  —  There's a feeling of pride, for sure, but no one on the Marlins is gloating.  —  “They've got their hands full …

Jeter talks about Jackie Robinson  —  Yankees shortstop discusses importance of No. 42  —  Derek Jeter was growing up in Kalamazoo, Mich., when he first heard the name “Jackie Robinson” from his father, Dr. Charles Jeter.  In the years since becoming a Major League Baseball player …

Brewers supposedly have signed Weaver  —  I received a tip from a reliable source this morning that the Brewers have signed free-agent right-hander Jeff Weaver to an incentive-laden deal.  —  I'm traveling to St. Louis this morning and won't be able to get it confirmed with club management until later …

Pitching Mechanics: Clay Buchholz  —  Red Sox phenom Clay Buchholz is one of the most-watched pitchers this year as Boston fans hope to see more of the outstanding stuff that he showcased in 2007, throwing a no-hitter in just his second major league start.  Everyone knows that Buchholz …

YANKS PLAN FIRST PITCH FROM SPACE  —  JERSEY NATIVE TO THROW FROM SPACE STATION VS. RED SOX  —  The Yankees today announced that NASA astronaut Garrett Reisman will throw out the ceremonial first pitch from the International Space Station prior to Wednesday's game vs. the Boston Red Sox.

Raissman: McCarver, Buck whiff with silent treatment  —  The only thing more stunning than Joe Girardi letting Mike Mussina pitch to Manny Ramirez on Saturday was Fox's Tim McCarver having absolutely nothing to say about the move.  A move that is still being discussed.

Dodgers' Torre and Jones have weight on them now  —  With Page 2 columnist ready to follow the Lakers, Torre has Kemp back in the Dodgers' lineup, and Jones has the weight of expectations.  —  It could be weeks, maybe months — whatever it takes, I will be there with the Lakers throughout the playoffs …

After “Late Night,” Mets' Wright voices concerns  —  After taking batting practice against David Letterman yesterday, David Wright laughed off a pitch that hit him in the back and said the 61-year-old was “bringing the heat.”  Wright wasn't as casual, however, when asked about the Mets' 5-6 start.