Watch: Lack of 'swag' convinced Vikings' McKinnon to change number

Minnesota Vikings running back Jerick McKinnon will wear jersey No. 21 this season, as opposed to the No. 31 he wore during his first two seasons, for a fairly unique reason.

McKinnon explained that, after last season, he got a phone call from his uncle Rudy, who told him "31 ain't really got no swag."

Fair point. Thirty-one is a rare number for running backs to wear.

McKinnon's mother, Frances McKinnon, wore No. 21 while she was a point guard at Pelham City High School, so her son decided to adopt her old number.

Swag: increased.