Mullen said Johnson “probably won’t be back until the start of school,” which is Aug. 19. He also said backup tight end Gus Walley could be out for the season because of recent Tommy John surgery, and another tight end, Rufus Warren, is questionable for the next couple of days with a sprained ankle.
Johnson missed the first five games of last season with a pectoral injury. He went on to make 10 catches for 171 yards and two touchdowns in eight games.
MSU is in the midst of two-a-days, and after one practice Sunday, it will hold two today.