Abraham, who will be 35 on May 6, was released by the Falcons last week to trim the salary cap. He is a four-time Pro Bowler and had 10 sacks last season. Abraham has registered at least 10 sacks in seven of the 13 years in his career. He was limited in his last game against the 49ers in the NFC Championship game.
Instead of being a defensive end in a 4-3 scheme, he would presumably move to outside linebacker in a 3-4 if he was signed by the 49ers. Abraham would improve the OLB depth, as Aldon Smith and Ahmad Brooks received little to no rest during the course of the 2012 season. Smith registered 19.5 sacks after the first 13 regular season games, but failed to record another in the postseason while dealing with a shoulder injury.
The 49ers also have Parys Haralson at OLB coming off a torn triceps injury who was a starting OLB in 2011, as well as 2012 draft class rookies Darius Fleming (who is coming off a torn ACL) and Cam Johnson.
Abraham is 6.5 sacks away from being in the all-time top-10 list of sack leaders.