Jim Harbaugh Syndication: USA TODAY

Former Michigan Wolverines head coach Jim Harbaugh made a promise that if the team won the national championship, he would get a tattoo to commemorate the title. And after the team won the College Football Playoff National Title this year, Harbaugh made good on that promise.

Before Michigan’s spring game on Saturday afternoon, Jim Harbaugh got a “15-0” tattoo under a block “M “on his right arm near his shoulder to commemorate the team’s undefeated 15-0 record and the College Football Playoff national title.

Several videos of Harbaugh and the tattoo circulated on social media on Saturday including one where the head coach offered his reaction to the pain – or lack thereof – that he felt while getting the tattoo.

“I’m impervious to pain,” Harbaugh said in the video.

He also joked about potentially adding another one shortly after this one was finished.

“I can see why once you get one [tattoo] you might want to start adding to it,” Harbaugh said.

If Harbaugh is going to add to this tattoo, it would likely be with a Super Bowl title as he decided to leave the Wolverines to become the head coach of the Los Angeles Chargers where he will pursue a Lombardi Trophy.

[JJ McCarthy Fan]