Greg Johnson is a cornerback for Old Dominion, standing 5'10" and weighing 185 pounds. A 2023 recruit from Midlothian Heritage High School in Texas, Johnson was a two-time First-Team All-District selection and First-Team All-State honoree as a senior. He initially joined Navy, redshirting in 2023 after appearing in four games, then played in all 13 contests in 2024 with five tackles and a tackle for loss. After transferring to Garden City CC in 2025, Johnson recorded 65 tackles, five interceptions, and six pass breakups before returning to Old Dominion as a redshirt junior.