The 29-year-old took a ball to the groin as he defended a free kick in his side's game against Arminia Bielefeld in the 2.Bundesliga on Saturday afternoon.
"You always play with your balls but this one I saved with my penis," Wolf told reporters afterwards.
"I never experienced such a free kick. First the pain was hellish but after some ice and rest it was OK.
"I have worn protection as a youth at Hallenspielen. But you can't run properly - it's crap!"