Richardson was selected in the seventh round (252th overall) of the 2012 NFL Draft.
He was picked second to last in the draft, the only player behind him was Northern Illinois quarterback Chandler Harnish, who was selected by the Indianapolis Colts with the 253rd pick.

On June 6, 2012, Richardson signed a four-year contract with the Rams worth $2.15 million.
During his rookie campaign, he was the primary backup to then Rams starting running back Steven Jackson over fellow draftee, second-round pick Isaiah Pead.
Richardson played in all 16 games, gaining 475 rushing yards on 98 attempts, as well as 24 receptions for 163 yards.
His best performance came in Week 2 of the regular season against the Washington Redskins when he rushed 15 times for 83 yards and scored a 2-point conversion.

Richardson was waived by the Rams on May 15, 2014.
Richardson was selected in the seventh round (252th overall) of the 2012 NFL Draft. He was picked second to last in the draft, the only player behind him was Northern Illinois quarterback Chandler Harnish, who was selected by the Indianapolis Colts with the 253rd pick.
On June 6, 2012, Richardson signed a four-year contract with the Rams worth $2.15 million. During his rookie campaign, he was the primary backup to then Rams starting running back Steven Jackson over fellow draftee, second-round pick Isaiah Pead. Richardson played in all 16 games, gaining 475 rushing yards on 98 attempts, as well as 24 receptions for 163 yards. His best performance came in Week 2 of the regular season against the Washington Redskins when he rushed 15 times for 83 yards and scored a 2-point conversion.
Richardson was waived by the Rams on May 15, 2014.
Daryl Richardson