Cosmi, a three-year starter for the Longhorns, is No. 10 on Mel Kiper's Big Board for the 2021 NFL draft. Kiper ranks Cosmi as the No. 2 draft-eligible tackle, behind Oregon's Penei Sewell, who opted out before the season.
The 6-foot-7, 309-pound Cosmi earned second-team All-Big 12 honors in 2019. He has made 34 consecutive starts at left or right tackle for Texas.
Horns 247 first reported Cosmi's decision to opt out.