Injuries can have long-term effects
Previously, injuries in Basketball GM had no lasting effects. Once a player healed, he was good as new. In the real world, we know that's not true.
So now, in Basketball GM, serious injuries (over 25 games) can result in decreased athleticism, depending on the severity of the injury and some luck. As an example, someone who gets a 100 game injury (probably a torn ACL) will have a 50% chance of making a complete recovery, but also a 67% chance of losing between 0 and 10 points of his speed, jumping, and endurance ratings, and also a very small chance of a much larger catastrophic decrease. Each of those losses is independent, so someone might lose 1 speed, 9 jumping, and 3 endurance. Let me know if you think these numbers are too big or too small.