70 - 68 players on roster + 9 seniors +3 = 14 Going by memory here, so I'll edit this when I see it at home if it's incorrect.
Might want to revisit this, you only have 12 seniors. You probably have 17 scholarships available as everybody's roster has 68 players.
After seeing the way my team has played the first few weeks, I believe I have 70 scholarships for next season...