...if he's going to score then you do what I used to do when I played in goals. Take Him Out(and I don't mean treat him to a nice Italian meal and a glass of red wine with the Spaghetti Carbonara, before heading out to one of the local night clubs where the 2 of you shall dance to the delights of the Chemical Brothers and other such well know dance artist, then insisting on waking him to the his place just to make sure he got home safe and maybe chance your luck at a “Coffee Invite” no that's for the special lady in your life)
I mean get him telt properly and make sure he becomes so afraid of you that next time around he cant' perform and fluffs every chance he gets.
Thats how I used to play in nets....most red cards in my team as well.