Sounds like he's out until training camp. "The treatment of partial patellar tendon tear is immobilization in full knee extension for 3 to 6 weeks in a cylinder cast. For partial patellar tendon tear maintenance of patellar height, cast or brace immobilization in full extension for 6 weeks followed by a therapy program to regain motion and strength may be appropriate. Progress must be slow to allow for tendon-to-bone healing. Strengthening exercises should be delayed for at least 3 months. You should go for the conservative treatment as surgical repair is done for complete ruptures. "