Yankees closer Mariano Rivera comfortable in bullpen session, could return Sunday from groin injury  —  TORONTO - Mariano Rivera had “no problems at all” during a 16-pitch bullpen session, clearing the way for him to return to the mound as soon as Sunday.  —  Rivera felt soreness and tightness …

Mets in ‘foul’ territory  —  Meet the mess.  —  The Mets' new $850 million stadium is breaking down at about the same rate as its beleaguered lineup, the Post has learned.  —  Less than a season old, Citi Field has been plagued by water damage to several luxury suites — including Jerry Seinfeld's …

No shortage of options  —  If Sox don't stick with Gonzalez, then . . .  Alex Gonzalez has given the Red Sox stability at shortstop, which was the goal when they acquired him from the Reds Aug. 14.  At least for the remainder of the season.  —  “I've enjoyed being back here,” Gonzalez said.

Ohlendorf Making '08 Trade Look Like a Steal  —  PITTSBURGH - Ross Ohlendorf has had a breakthrough season for the Pittsburgh Pirates, going 11-9 with a 3.97 E.R.A. for a last-place team.  But he is also Princeton graduate with an off-season ranching business and a relentlessly curious mind.

Schneider taking role as Thole's mentor  —  Veteran imparting wisdom onto rookie backstop  —  NEW YORK — The left-handed-hitting 23-year-old wearing the chest protector, shin guards, mask and Expos uniform was Brian Schneider, and Schneider was very much the rookie — Expos red, white and blue and rookie green.

Inbox: How can Nationals improve?  —  Beat reporter Bill Ladson answers Nats fans' questions  —  After two seasons of almost 200 losses, I think the Nationals need to sign some free agents to bridge the gap.  Is management seriously considering acquiring veteran starting pitching …

Jeter's three hits not enough as Jays rout Yanks  —  Rookie Randy Ruiz hit an RBI single during an eight-run fifth, then was hit in the face by a pitch later in the inning Sunday as the Toronto Blue Jays beat the Yankees 14-8.  —  Ruiz became the latest hitter in the majors to recently get beaned.

Unlike Shea, Ron Santo likes New York Mets' new park  —  At least it doesn't remind Chicago Cubs broadcaster of 1969  —  NEW YORK — Ron Santo's least-favorite destination in America was the now-obliterated Shea Stadium, for reasons most Cubs fans know by heart.

Gallardo to be skipped; Colome released  —  Two bits of pregame news today:  — In an effort to limit his workload, the Brewers will essentially skip Yovani Gallardo's next start and use him next on Sept. 15 in Chicago.  Since the team has an off-day Thursday, the other four starters …

Coste: Charlie didn't have to lose faith in my defense  —  HOUSTON — As Chris Coste spoke, he didn't sound bitter.  —  But the former Phillies backup catcher, who is serving the same role with the Houston Astros, did say that he never understood why his former employers felt the need to replace him.

D-Backs-Dodgers deal hits snag  —  D-Backs feel Dodgers did not act in good faith in swap sending Garland to LA  —  When the Diamondbacks agreed Monday to send pitcher Jon Garland and cash to the Los Angeles Dodgers for a player to be named, they expected that player to be Tony Abreu …

Aybar lifts Halos after Lackey's gem  —  Postseason-worthy duel dominates tight extra-innings win  —  KANSAS CITY — The Angels got a small dose of October baseball in the most unlikely of settings.  —  There was a pitchers' duel — an eight-inning staredown between John Lackey and Zack Greinke …

It's Andrew Miller time again for Florida Marlins  —  LHP Andrew Miller was called up today.  He said he expects to pitch as a long reliever out of the bullpen.  —  He was optioned to Class AAA New Orleans on July 20 before rolling his ankle on July 29.  —  “It's frustrating …