Here's another angle. In 2015 he missed the last 12 games - 2014 the last game - 2013 the last 5 games (although returned for the super bowl) - 2012 the last 3 games. If you have any hopes of making the playoffs there's a good chance Percy won't be there at the end for you. Again, the risk to me is getting dependent on him then he leaves so you're right back to having to work in other guys anyway. I'd rather start the year off working the other guys in.