Iowa State wide receiver Hakeem Butler is visiting the 49ers on Tuesday, a league source told NBC Sports Bay Area.
Butler is one of a handful of top wideouts to take part in visits to Santa Clara on Monday and Tuesday, a group that includes NKeal Harry, Deebo Samuel and A.J. Brown.
Butler, along with the other wideouts to visit the 49ers, could be an option for the team in the second round of the draft. The 49ers own the No. 36 overall selection.