A person with knowledge of the injury says Indianapolis Colts cornerback Marlin Jackson will miss the rest of the season after tearing the ACL in his left knee.

The person spoke to the Associated Press on condition of anonymity because the Colts had not announced the injury. It occurred during Thursday's practice.

The injury was first reported by ESPN and the Indianapolis Star.

Jackson made 23 consecutive starts at cornerback before tearing the ACL and meniscus in his right knee during a no-contact practice in October 2008.

He had missed the past three games with a strained ACL in his right knee. Jackson's newest injury came a day after the Colts placed linebacker Tyjuan Hagler on injured reserve with a ruptured biceps.

The team declined to comment on Jackson's injury.

Jaguars: A jury convicted a man of attempted murder in the shooting of former Jacksonville offensive lineman Richard Collier in 2008.

The six-person jury deliberated two hours and 45 minutes before returning its verdict against Tyrone Hartsfield, 33, at the end of a nine-day trial. Hartsfield faces up to life in prison. He still faces a charge of possession of a firearm by a convicted felon, but it's not clear if prosecutors will pursue it. Collier was paralyzed from the waist down and his left leg was amputated.

Steelers: Ryan Clark may be saying everything he needs to say with his

growing silence. The Pittsburgh safety is usually one of the team's most talkative players. But he is talking little as it becomes increasingly likely he won't play Monday in Denver due to a rare blood condition that nearly caused him to die after playing there two years ago.

Nearly all of Clark's teammates are urging him to skip the game. The other Steelers safeties are being readied to play, and Clark does not appear as upbeat or as excited as he normally does before a game. During a time he often chats with reporters, Clark sat alone in front of his locker, scanning messages on his cell phone before practice on Thursday.

Even if Clark pleaded with them to play, the Steelers appear reluctant to take a chance considering how seriously ill he became after that 2007 game, which Denver won 31-28. Clark was hospitalized in Denver when complications from sickle-cell trait prevented oxygen from flowing into his spleen. He later needed operations to remove his spleen and gall bladder, and the 205-pound Clark lost more than 30 pounds before he finally began feeling better more than two months later.

Redskins: Defensive coordinator Greg Blache broke his media silence to defend the man who pays his salary, saying "Enough's enough" when it comes to criticism of owner Dan Snyder.

Blache said he was moved to speak after reading comments made by Hall of Fame running back John Riggins, who called Snyder a "bad guy" whose "heart is dark" in an interview for Showtime's "Inside the NFL."

"That's totally, totally untrue," Blache said.

Seahawks: Quarterback Matt Hasselbeck participated fully in practice a day after sitting out to give his broken ribs a rest.