Looking for leg routine that doesn't involve squats...

[megad]

Deads work the legs quite a bit as well.

A combination of deads, single legged squats with DBs, and leg press could actually help him gain alot of mass.

 

[Zander1983]

Awesome leg routine minus back squats:
http://www.t-mag.com/articles/182squat.html

 

[Lumberg]

overhead squats are cool too. they build balance big time.