1. Players who have tendon injuries repaired through surgery have a worse career trajectory than those who have surgery for fractures and sports hernias.
2. Patellar tendon repair has the greatest negative effect on careers followed by anterior cruciate ligament repair and Achilles tendon repairs.
3. The researchers used team injury reports, public records and press releases over a 10-year period to create the database. They then developed performance-based outcome measures on the players' careers before and after surgery.
