The 2012 draft saw the Rams select two running backs, Daryl Richardson and Isaiah Pead, indicating a potential future running back by committee scenario. With the retirement of LaDainian Tomlinson, Jackson became the NFL's active leader in career rushing yards, where he remained for over three years until passed by Frank Gore in October 2015. In Week 12, against the Arizona Cardinals, he had a season-high 139 rushing yards. In Week 15, Jackson became the 27th running back in NFL history to rush for over 10,000 yards, and the sixth running back in league history to compile eight consecutive 1,000-yard rushing seasons. Jackson ended the 2012 season with 1,042 yards rushing and four touchdowns. At the conclusion of the season, Jackson chose to opt-out of the final year of his contract, to pursue a starting job on a contender.