I hope White plays well, but he has been snakebitten with injuries, and that means that he has not been able to get the experience required to play WR in the NFL. There are just too many factors going against him to think there is a realistic chance he will be even good.
1. Lack of game time snaps - WR is a position that requires development even with the best talent.
2. His confidence may be shaken - we saw it last year during camp and prior to his injury, he looked worried that he might get hurt again, and that is exactly what happened
3. He may simply not be built to take the beating of an NFL season. He broke his leg because he was working too hard? I have heard of ligaments and muscles being damaged by over use, but to break a bone seems very uncommon to me.
I give him about 60% chance of making the team, mainly because he is already going to get paid, but I only give him about 20% chance of being a productive part of the team, and about 5% chance of him making a sizable contribution AND staying healthy the entire season.
I'm still hoping for the 5%, and I give him all respect for fighting through the injuries to get back in shape for the upcoming season.