Rams quarterback Sam Bradford will undergo surgery in a few weeks for a torn anterior cruciate ligament in his left knee. His season is over according to league sources.

That means Kellen Clemens will start in the Rams’ next game an Oct. 28 nationally televised Monday night contest against NFC West power Seattle.

Bradford’s injury leaves the Rams with only Clemens on the active roster so the team will add another quarterback this week. Contrary to some speculation Sunday night signing Tim Tebow to the roster is not an option according to sources familiar with the situation.

Bradford suffered the injury landing awkwardly on a fourth-quarter quarter scramble in Sunday’s 30-15 loss to Carolina at Bank of America Stadium. He was tackled on the play by safety Mike Mitchell who shoved Bradford out of bounds on a legal hit but a hit that probably didn’t need to be made.

Although most observers particularly those on the national scene have downgraded Bradford’s play because of an awful performance in a Week 4 Thursday night loss to San Franisco he had shown noticeable improvement this season and was on pace for career highs in most categories.