San Francisco 49ers linebacker Scott McKillop tore the patellar tendon and anterior cruciate ligament in his left knee during training-camp practice Wednesday and likely will miss the 2010 season.
The Sacramento Bee reported that McKillop suffered the injury when he jumped to deflect a pass and awkwardly landed on his left leg. Trainers tended to McKillop, who was carted off the field.
The 49ers confirmed the injury in a statement Thursday, but they didn't say if McKillop will have to sit out the season.
McKillop played in all 16 games as a rookie last season and led the 49ers in special-teams tackles last season. According to The Bee, McKillop had practiced as Pro Bowl linebacker Takeo Spikes' backup during training camp, but the injury gives third-round draft pick NaVorro Bowman and veteran Matt Wilhelm a chance at more playing time.