http://whatifsports.com/hd/PlayerProfile/Ratings.aspx?tid=0&pid=2407911
5 left in ath and def
17 left in lp
5 left in speed
I want him to start next year but need to know if he would be good

I don't think he's very good at starting SF (mabye average?).  He might be a decent back-up PF or Center, if you don't care about rebounding.  Basically he's good at defense but probably too slow for SF defense.  Whereas at PF or C the speed might be ok.  His LP of >70 (once it's maxed out) may provide a few points off the bench, but I can't imagine against top players he would be able to score that much.  With such low BH & Pass skills, I would be concerned about playing him at SF, combined with the low speed.  Does he have potential at BH and Pass?

Absolutely not an SF- did you mean PF?  A guy with no spd/per/bh/p won't be any good at SF.

He definitely has a PF skill set, not built for SF.

no. 

Here is the guy i'm going to start next season. He still has high potential in rebounding, avg in speed, def, blocking, BH

http://whatifsports.com/hd/PlayerProfile/Ratings.aspx?tid=0&pid=2346970

Here's the guy that's graduating and i'm replacing. I wish he had more PER, but he was incredible efficient.

http://whatifsports.com/hd/PlayerProfile/Ratings.aspx?tid=0&pid=2227005

high bh and avg pass

You need to start getting some improvement in those categories quickly if you want him to be a starter next year. I think he'd be a solid starter once he gets that improvement.