Yeh, patella Tendonitis. Depends on how bad it is. Mine required knee surgery. I hurt it then played on it for another year and a half on and off. I rested but it never got better until I finally had to have surgery. Surgery will take about 3-6 months to recover and and 6-9 months to get good enough strength back in the leg to play again. Watch out for patellafemoral syndrome though if you have surgery. It's something you get when the quadriceps muscles are off balance (meaning one of the 3 quad muscles is way stronger than the other 2).