12:47 UPDATE: It's official. The Eagles have signed safety Colt Anderson and released running back Joique Bell. Defensive end Pannel Egboh was released from the practice squad, clearing a spot if the Eagles want to bring Bell back.
The Eagles expect to sign safety Colt Anderson off of the Vikings practice squad, bolstering a position left thin by Nate Allen's neck injury. A team source confirmed the plans Wednesday morning. It was first reported by Montana news outlets.
Anderson was an undrafted free agent signed by the Vikings after the 2009 draft. He was a three-year college starter at Montana. His agent told the Missoulian Anderson received a three-year contract. "I'm excited to get out on the field and prove myself," Anderson told the paper.
With Allen likely out Monday against the Redskins, the Eagles have just two healthy safeties: Quintin Mikell and rookie seventh-round draft pick Kurt Coleman. Anderson will likely serve as a back up to those two and possibly play on special teams. If he's active Monday night it will be his first chance to play in a regular season game. Because he was signed off another team's practice squad, Anderson must stay on the Eagles 53-man roster for at least three weeks.
The Eagles released running back Joique Bell to make room for Anderson on the roster. Bell had played in just three games, all on special teams.
The Billings Gazette posted this breakdown of Anderson when he first came out of college. It called him smart and instinctive, though not very large or fast for an NFL safety.