Campbell made the announcement Thursday on Twitter, posting a video of himself with one finger raised and the caption: “One more.”
ESPN’s Mel Kiper rated Campbell, a redshirt sophomore, as the No. 9 draft-eligible wide receiver for 2018.
Campbell had 40 receptions for 583 yards and three touchdowns this past season, his second as a starter. He eclipsed 100 receiving yards twice in the first four games but had only two receptions in Ohio State’s final two contests.