The Giants have signed 27-year old WR/PR/KR Adam Jennings.  Jennings played in 1 game for the Detroit Lions last season and he returned 1 kickoff for 8 yards.  Jennings has played 4 years in the NFL appearing in 46 games in which he has caught 6 passes for 62 yards (10.3 avg) with 1 TD grab.  He has also returned 54 punts for 337 yards (6.4 avg) and 25 kickoffs for 559 yards (22.4 avg).  The Giants will likely give Jennings a chance to win a job on special teams in 2010.