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The Packers placed safety Derrick Martin on injured reserve with a knee injury that he suffered Sunday at Washington. His season is done.

After Greg Bedard also reported on his twitter account that tight end Jermichael Finley will be out longer than the original three weeks expected following surgery, there is a new update. Bedard has learned from a source that the surgery revealed more damage than initially thought and that Finley is likely done for 2010.

ANOTHER UPDATE: Just got off the phone with Bedard. He said the Packers doctors originally thought they would have to remove Finley's meniscus, which would have actually meant a quicker return to the field for the tight end. But during surgery, they discovered they could repair the meniscus, which in turn means a longer recovery but a better long term prognosis for Finley in the long run. Finley's recovery is expected to now be 8-10 weeks and the Packers are deciding whether or not to wait for his return.

The team also announced that it signed linebacker Robert Francois to the active roster from the practice squad.

It also added safety Michael Greco and linebacker Mike Rivera to the practice squad and released LB Johnny Williams from the practice squad.

From the team release: Francois, a 6-foot-2, 255-pound first-year player out of Boston College, spent the final four weeks of the regular season and the playoffs on the Packers’ practice squad in 2009. He was released by Green Bay in the final roster cutdown in September, and has been on the practice squad for four of the five games this season. Francois entered the NFL as a non-drafted free agent with the Minnesota Vikings in May 2009. He will wear No. 49.

Greco is a 6-foot-3, 224-pound rookie out of Central Florida, signed with the N.Y. Giants in April 2010 as a non-drafted free agent and was with the team during the preseason. He will wear No. 43.

Rivera, a 6-foot-2, 245-pound first-year player out of Kansas, spent the entire 2009 season on the Tennessee Titans’ practice squad and was with the Titans during the preseason this year. He entered the NFL as a non-drafted free agent with the Chicago Bears in May 2009. Rivera will wear No. 48.