The Vikings on Tuesday signed rookie third-round pick Jerick McKinnon, the St. Paul Pioneer Press reports.

McKinnon, a running back from Georgia Southern taken with the No. 96 overall selection, is expected to be utilized as a third-down back and compete with Matt Asiata to be Adrian Peterson's primary backup. McKinnon was in line to receive a signing bonus of $515,000 and a total deal worth about $2.75 million over four years.

"I think we're going to find some things for him to do," coach Mike Zimmer said during organized team activities last week. "He's short in stature, but he's got big legs and a big rear end. He's got explosiveness, so I think we'll find some things for him to do."