Allen was drafted out of Ohio State by Tampa Bay in the fourth round in 2004. He started eight games in 2005 and then 16 games in 2006.
Allen, who'll turn 28 in June, lost his starting job in 2007, and in 2008 was named special-teams captain. He was named a Pro Bowl alternate following the 2008 season as a special-teams player, but started only two games last season and hasn't had an interception since the final regular-season game of 2005, Mike Tomlin's last season as secondary coach at Tampa Bay. Allen has four career interceptions.
Battle also played primarily special teams the last two seasons.
A seven-year veteran of the San Francisco 49ers, Battle was drafted in the sixth round out of Notre Dame in 2003. His career peaked during the 2006-07 seasons when he caught 109 passes for 1,286 yards.
Injuries slowed Battle in 2008, and last season he caught only five passes for 40 yards. His primary job last season was returning punts, but he averaged only 2.9 yards in 21 returns.