Add a special piece of Oklahoma Sooners memorabilia to your collection with this Baker Mayfield Autographed Riddell Speed Helmet with ''HT 17'' Inscription. Mayfield started his collegiate career at Texas Tech but would transfer to Oklahoma after one season with the Red Raiders. During his first year of eligibility with the Sooners, he started all 13 games and tossed for 3,700 yards and 36 touchdowns. His play earned him Big 12 Offensive Player of the Year and First-Team All-American honors. After another great season in 2016, he followed it up with an amazing 2017 that resulted in him winning the Heisman Trophy. Mayfield threw for more than 4,600 yards and 43 touchdowns to only six interceptions that year, while also leading Oklahoma to their third straight Big 12 Championship and a spot in the College Football Playoffs. You can remember his iconic Heisman Trophy-winning season with the Oklahoma Sooners by picking up this autographed helmet.