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Shonn Greene likely out 2 weeks

NASHVILLE, Tenn. -- Tennessee Titans running back Shonn Greene underwent arthroscopic surgery on his right knee, coach Mike Munchak said Tuesday night on his weekly radio show. Munchak said Greene had the procedure on Monday.

Munchak says Greene will be on a week-to-week basis. A source told ESPN that Greene will likely miss the next two games.

Greene was injured during the Titans' opener, a 16-9 road win Sept. 8 against the Pittsburgh Steelers. He'd carried four times for 18 yards.

The Titans' third back, Jackie Battle, worked in Greene's place from there against the Steelers, and again in Sunday's overtime loss to the Houston Texans.

The Titans signed Greene to a three-year, $10 million deal in March as a short-yardage, change-up back to speedster Chris Johnson.

Though he's averaged only 2.4 yards a carry, Battle converted a fourth down against Pittsburgh and scored the Titans' only touchdown. He failed to convert a fourth down in Houston. He beat out Jalen Parmele in training camp for the third running back spot.

The Titans play their home opener against the San Diego Chargers (1-1) on Sunday, then have home games against the New York Jets and Kansas City Chiefs after that.

Information from The Associated Press was used in this report.