If you have never lost the use of your right hand, let me tell you, their are a number of things you only do with your right hand. I severly burnt my right arm when I was 19, I couldn't use it for anything. Luckily I had a willing GF at the time to fill the most pressing need, however, I challenge any of you to try and wipe with your left, its just something you have never done in your life. There are numerous other challenges, but I'll leave it at that.
The most logical thing might be to move him to guard until his finger heals, Mason was touted as switching to center coming out in the draft. If this is going to be a long term injury, that might be the best fix.