Nats' Strasburg headed to DL

Washington Nationals starting pitcher Stephen Strasburg throws against the Florida Marlins during...

Washington Nationals starting pitcher Stephen Strasburg throws against the Florida Marlins during the fourth inning of MLB National League baseball action in Washington August 10, 2010. REUTERS/Larry Downing

SPORTS NETWORK

, Last Updated: 8:01 PM ET

Washington - Washington Nationals rookie phenom Stephen Strasburg will be placed on the 15-day disabled list on Thursday with a strained flexor tendon in his right forearm.

Strasburg underwent an MRI on Sunday and is scheduled for an arthrogram later in the week to better determine the extent of the injury.

"The arthrogram is going to be performed [in Washington]," general manager Mike Rizzo said on Monday. "It's a different type of MRI where they inject dye into the area. Right now, we see a flexor issue. To get a clear diagnosis, we've gone to the extreme of going to an arthrogram. The results, I think, will be back within a 24-hour period."

Strasburg was expected to start Thursday's tilt against St. Louis, and the club may bring up Jordan Zimmermann for the spot start. Zimmermann, the club's second-round pick in 2007, was having a decent rookie campaign in 2009 before having to undergo Tommy John surgery in August.

In the fifth inning of Saturday's game against the Phillies, Strasburg's third pitch to Philadelphia right fielder Domonic Brown went for a ball, and the righty immediately winced in pain following the throw. He glanced down toward his elbow and began shaking his arm. Shortly thereafter, trainers and manager Jim Riggleman came out and replaced him with Craig Stammen.

The injury is similar to the one that cost A's pitcher Ben Sheets all of 2009. Sheets tore his flexor tendon at the end of 2008 before sitting out 2009, signing with Oakland and suffering the same injury in 2010, putting him on the shelf for the remainder of the season.

Saturday marked Strasburg's third start since coming off the disabled list earlier in the season for right shoulder inflammation.


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