Denver Broncos running back Knowshon Moreno underwent arthroscopic surgery on his right knee following the end of the 2012 season, John Fox announced Thursday from the NFL Scouting Combine. Moreno had stem cells harvested from bone marrow in his pelvis and injected into his knee.
Moreno tore the ACL in his right knee at the end of the 2011 season and left the Broncos playoff loss to the Ravens due to a knee injury suffered in the third quarter. He played in eight games during the 2012 season, rushing for 525 yards and four touchdowns on 138 carries; he also added 21 receptions for 167 yards. Moreno was ruled inactive for eight straight games from Week 3 through Week 11, but was reinserted as a starter following an injury to Willis McGahee.
After undergoing surgery, Moreno is now back at the Broncos' Dove Valley complex, rehabbing his knee. He is entering the final year of his rookie contract, with a club option available for the 2014 season.