For a moment I was wondering how the hell you could let an ancient Peyton Manning with two sprained ankles get away from you on a sack, but they got him.
Edit: The modern punts in a game record(1960 onward) seems to be 16 back in 1998 by Leo Araguz.
Holy shit, that had to be one horrible game to be at. 7-6. Ryan Leaf vs Donald Hollas(WHO?)
http://www.pro-football-reference.com/boxscores/199810110rai.htm