On Sunday, in a game against the Tampa Bay Buccaneers, New Orleans Saints head coach Sean Payton tore his MCL and fractured his knee when one of his own players was tackled out of bounds and crashed into him on the sideline. You can watch the replay here if you have a thing for gruesome knee injuries.
Payton is the rare NFL head coach who still calls the offensive plays, so the injury presented a pretty big problem for the Saints, especially since it happened early in the first quarter. Rather than going to the training room, Payton gutted it out on the sideline and kept calling plays while trainers tended to his knee. By halftime though, with the Saints trailing 20-10, Payton had had enough and passed play-calling duties over to his offensive coordinator Pete Carmichael.
It's tough to say what effect the injury had on the Saints' offense Sunday; they lost 26-20. By the numbers, the Saints' output was fairly even through the first to second half.