"The NFL is split on which position Harris will play. He's a big pass catcher," wrote Melo.
The other teams that have reportedly met with Harris include the Arizona Cardinals, Los Angeles Rams, New England Patriots, New York Jets, and several others.
Harris recorded 49 catches for 987 yards with nine trips into the end zone in his final two seasons with the Knights, per Sports Reference.
NFL teams are allowed to conduct up to five video calls per prospect leading to the draft, and each call can last up to one hour. There is no limit to how many phone conversations NFL teams can conduct with draft-eligible players.
San Francisco has also reportedly spoken with tight ends Brevin Jordan of Miami and Tommy Tremble of Notre Dame.
The 2021 NFL Draft begins on April 29.