Melo adds that he has spoken with scouts who believe Manning can be an NFL starter at center or guard. The offensive lineman had over 40 starts at tackle, signifying great versatility, a quality highly sought by the 49ers.
"I recently spoke with the San Francisco 49ers, Dallas Cowboys, Indianapolis Colts, and Green Bay Packers," Manning told Melo during a recent interview.
The 49ers have three offensive linemen scheduled to become unrestricted free agents. They are Mike McGlinchey, Daniel Brunskill, and Jake Brendel. In addition, offensive lineman Colton McKivitz is slated to become a restricted free agent.
Manning (6-4, 299) will participate in Hawaii's pro day on Wednesday.
"I'm putting in work every single day," Manning told Melo. "… It's been a great process. I've been working with Pete Bommarito and his staff down in Florida. They've done a great job getting my speed up. I've been getting stronger as well."