He leads the NFL in passing yard, attempts and is tied for the league lead in touchdown passes.
Luck's also near the top of the league in another category, one he's not proud to be associated with: turnovers.
The Colts' quarterback has thrown 13 interceptions and lost half of his 12 fumbles. He had three turnovers -- two interceptions and fumble -- against Cleveland last weekend.
Turnovers are a subject that Luck doesn't like talking about, either.
"Too many turnovers," Luck said. "It starts with me. The interceptions, the fumbles; you can't do it. I don't know what else to say about it. I work on it in practice, and I've got to do it. I've just got to take care of the football better."
Luck is the one who is credited with the turnover, but they're not all his fault. There have been times where the ball was stripped from behind on Luck because one of his offensive linemen was beaten on a play. But there are the plays where Luck's competitiveness takes over and he refuses to let a play end. He'll try to force a throw into tight coverage instead of just throwing the ball away or he'll try to do too much with the ball instead of just tucking it away and taking a sack.
"You just know when to say when," offensive coordinator Pep Hamilton said. "My philosophy with him has always been a punt after a third down completion is not a bad play. But I have to do my part also, I've got to find ways to get guys open and give him a check down, give him an outlet, not put him in a position where he has to hold the ball for an extended amount of time in known passing situations. I'll do a better job there also."