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Colts put RB Hart on IR, lose Addai estimated 2-4 weeks

INDIANAPOLIS -- The Indianapolis Colts needed help in their
injury-depleted backfield.

They expect three new running backs to fill the holes.

With Pro Bowler Joseph Addai unlikely to play Sunday against
Green Bay, and Mike Hart out for the rest of the season, the Colts
added three running backs to the roster Wednesday - one day after
acquiring defensive tackle John McCargo in a trade with Buffalo.

Addai left in the first quarter against Baltimore on Sunday with a
hamstring injury, and Hart, a sixth-round pick who was Michigan's
career rushing leader, hurt his right knee in the second quarter.
Coach Tony Dungy said Wednesday that Hart had been placed on
injured reserve with an injured anterior cruciate ligament, though
Dungy wasn't sure it was torn.

The only other running back on the Colts' active roster was
veteran Dominic Rhodes.

"I don't know if he [Hart] will have surgery or not," Dungy
said. "It's really, really a shame. He's a good player who brought
a lot of energy. We think Chad Simpson can do that, too."

Simpson, an undrafted rookie from Morgan State, was promoted
from the practice squad.

Addai has a slightly torn hamstring that might sideline him an estimated two-to-four weeks, a Colts source told ESPN.

Dungy on Wednesday said that the tweaked hamstring will likely be
enough to keep him on the bench at least this weekend.

"I wouldn't look for Joe to play this week, I think Dominic
will start," Dungy said. "But I don't think it's going to be very
long. I suspect that by the end of the week, there might be some
thought of playing him, but my sense is we'll go with three guys."

According to ESPN's John Clayton, Addai is expected to seek a second opinion on his hamstring injury. As much as he would like to play, he also knows that if he comes back too soon from it, he risks aggravating it and sidelining himself even longer. So there is a chance Addai might miss anywhere from two to four weeks, though it probably will turn out to be less time than more.

The Colts' running options include Rhodes, the former 1,000-yard runner who helped
Indy win the Super Bowl in 2006, Simpson, the fastest and shiftiest
back on the roster, and Clifton Dawson, who played with the Colts
last season before being cut in August.

Besides promoting Simpson, the Colts signed rookie Lance Ball to
the practice squad and re-signed Dawson, who spent the past seven
weeks working out in hopes of getting a phone call.

To make room on the active roster for Dawson, the Colts waived
recently signed defensive back Nick Graham.

There was some positive injury news for the Colts. Outside
linebacker Tyjuan Hagler, who has been on the physically unable to
perform list with a torn pectoral muscle, practiced for the first
time Wednesday.

Starting guard Ryan Lilja, also on the PUP list, however, still
has not started practicing since having offseason surgery on his
right knee.

The team has three weeks to activate Hagler and Lilja or they
will miss the rest of the season.

Safety Bob Sanders, the 2007 defensive player of the year, may
return in the next few weeks. Sanders hasn't played since spraining
his right ankle in Week 2 against Minnesota.

"I doubt that he'll practice this week, but when he can run,
he'll be out there," Dungy said. "It's just the high ankle sprain
that's keeping him out."

Information from ESPN senior NFL writer John Clayton and The Associated Press was used in this report.