Nathan opts to undergo Tommy John surgery

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Joe Nathan headshot.jpg9:36pm: Christensen passes along word that Nathan has opted to undergo Tommy John reconstructive elbow surgery and will miss all of the 2010 season.  The throwing session apparently ran less than smoothly:

“It didn’t go like we hoped,” Nathan said. “We knew it was a long shot,
but this will help clear my head.”

8:48am: Joe Nathan finally got around to playing catch Sunday morning, a final test before he decides whether to undergo season-ending elbow surgery.  Joe Christensen of the Minneapolis Star-Tribune is awaiting word from the Twins, as are we.

Nathan was diagnosed with a torn ulnar collateral ligament last week and will miss a large chunk of the 2010 season no matter what course he takes.  After all, rehab for such an injury would almost certainly last several months.

The 35-year-old closer collected 47 saves last season while posting a 2.10 ERA, 0.93 WHIP and 89/22 K/BB ratio in 68 2/3 innings of work.  The Twins haven’t announced who will fill in for him this season, though it’s safe to guess that Jon Rauch and Matt Guerrier are the front-runners for the substitute gig.  Rauch has closing experience and Guerrier is one of the finest setup men in the game.