Adrian Peterson rushed for 2,097 yards in 2012. More than half came while he was suffering from a sports hernia.

Specially, he gained 1,068 after Week 10, when he says the injury occurred against the Lions.

“That next day I felt very uncomfortable in my groin and abdominal area,” Peterson tells Josina Anderson of ESPN. “I thought to myself I’ll just wait until I recover but I never did. I came out after that play. Each week it just got worse and worse and worse.”

Peterson said the pain was the worst in Week 16 against the Texans.