Veteran kicker Adam Vinatieri wasn’t the only Indianapolis Colt to undergo surgery recently. While Vinatieri had hip surgery earlier this week and is expected to be ready for the regular season, Colts starting running back Joseph Addai disclosed that he had arthroscopic knee surgery, according to Mike Chappell of the Indianapolis Star. “Got it cleaned out,’' Addai told the Star. “It’s feeling good right now.’' In a dozen starts last season, Addai, who’s being held out of practice while he recovers from surgery, rushed for a career-low 544 yards and five touchdowns. Addai didn’t display nearly the same explosiveness that he flashed during his rookie season when he rushed for 1,081 yards and seven touchdowns with a 4.8 average per carry, or in 2007 when he rushed for a dozen touchdowns, 1,072 yards and a 4.1 average per carry. “He’s working through a bit of a rehab situation, but he’s in fine physical condition,’' Colts coach Jim Caldwell said. “He’s been lifting, doing all the things that have been required of him.’' There are some skeptics around the league, though, that are beginning to wonder about Addai’s lack of recent production. The Colts drafted University of Connecticut running back Donald Brown in the first round to work in tandem with Addai this fall. And it’s plausible to think that Brown will eventually become the starter given his draft status and skills.