I'm no medical expert, but it would seem he has a good chance.
DODMERB is a nasty beast, not because of the work it does, but because during the application process, when everything seems to be going so great.... some DODMERB issue comes up.... and it shakes your foundation.
I applied to USCGA, USNA and USMMA in 2001. During the process I got dinged for a broken arm in 1997, non-ossifying fibroma (soft spot on a bone in my knee... that hadn't hardened yet), and ADD. My dad's a doctor, so his feedback was helpful.... but every step of the way... something would come up.
First... the ADD... I knew that would need a waiver. As my medical files were forwarded, the broken arm came up and then my knee. Each time, a new set of DODMERB documents were sent... and each time I thought my journey had ended. But it didn't.
Keep your head up! The DODMERB process isn't always quick and it can be frustrating.... but you'll get through it. I recommend keeping all of those DODMERB disqual letters... and making a nice scrap book with them down the road!