Roman Reigns worked a Last Man Standing match with Kane at the open of last night's episode of Monday Night Raw in Austin, Texas. He was injured in the process, suffering a cut on his head that required six staples to close.
WWE.com has the word:
"We brought Roman Reigns back to the trainer's room after he sustained a laceration to his forehead when his forehead hit the ring post," said WWE physician Dr. Chris Amann. "We cleaned him up real well and put in six staples to close the wound. He's going to be cleared for SmackDown on Friday."