He was offered a contract after a successful mini-camp tryout[4] at the invitation of Redskins defensive coordinator Gregg Williams.
Keasey went on to make the initial regular season 53 man roster as a reserve linebacker.
[8] On August 30, 2008, Keasey was named starting fullback over veteran Moran Norris, who was subsequently released.
[9] After starting the first 7 games of the 2008 season, Keasey was placed on injured reserve in week 8 with a torn biceps tendon.
On August 19, 2009, Keasey was released by the San Francisco 49ers with an injury settlement to make room for more roster depth on the training camp squad.