The bigger determining factor will be his injury rating. This will determine how often he gets injured. His health would determine which body part would get injured when he gets injured.
Here is a quote from Josh Looman, the producer of the game:
"If a player has a low injury rating, there is a really good chance they'll get hurt at least once during the season. if a player has a 95-99 injury rating, there is a good chance they'll rarely ever get hurt. Toughness impacts how long they take to heal. And you have to factor in the trainer's abilities, also. And their health at each body part."
Here is a good analysis from Mike3207:
"Well for me the most important thing you want to look at is not either health or durability, but a player's injury rating. Injury rating covers how frequently the player is going to get injured.
Example one-WR Earl Bennett.He's basically never injured or suffers ill health, and under normal circumstances he'll never suffer a injury.He's not only got a high injury rating, but good scores in the other health ratings.
Example 2-LT Joe Staley-He's got a pretty good injury rating, but he does suffer from occasional injuries.I'd say his injury rating is in the low 90's.
Example 3-DT Tommy Harris-his injury rating is not good, and you can get expect him to get injured on a regular basis.I'd say he's good for about 8-12 games a year on the average.
Overall health is a composite of the individual health on all your body parts.When you suffer a injury and one of them is damaged, it will downgrade and transfer over to your overall health as well.Enough of those injuries, and you'll see a significant drop in your durability as well.
A good trainer really isn't going to prevent injuries.I had injuries even with a 99 overall trainer.What a good trainer will do is help your players get back faster than a bad one.
The one thing I don't know is what determines whether something is a one day injury or one that ends a season.Is that where Toughness comes in-maybe.
In short(too late), you want to look at Injury Rating, Durability, and then Health. A player with a 99 IR and 99 Dur can have a long career even at 80 health. On the other hand, a player with 80 Injury rating will likely get frequent downgrades to both his health and durability before too long.Still, the lower a body part gets in health the more likely it will get injured again, so do your best to keep the health in the body parts up."
Make sure to check out the forum links below for a lot of good insight and information.
https://forums.operationsports.com/f...ns-thread.html
https://forums.operationsports.com/f...edge-past.html