Patriots' quarterback Tom Brady suffered a torn anterior cruciate ligament (ACL) and torn medial collateral ligament (MCL) in his left knee, NFL sources confirmed on Wednesday. Medical tests on the knee, including an MRI performed Monday, indicated no damage to other knee ligaments and no torn cartilage. The typical course of action for such an injury is to wait 4-6 weeks for the MCL tear to heal, then reconstruct the ACL. Brady will likely undergo surgery in approximately one month and face 6-9 months of recovery and rehabilitation, barring any complications.