SUNY Cortland Athletics

2025: Saw action in all 11 games during the year for Cortland...Provided 20 tackles, nine solo, 1.0 tackles for loss, 1.0 sacks, and one forced fumble for the season...Finished with four tackles and a sack in a road win at Morrisville...Registered a season-high five tackles in a home victory over Brockport...Tallied three tackles in a road win at Alfred State...Made two tackles in a home victory over Alfred University...Finished with one solo tackle and one forced fumble against Grove City...Made one solo tackle in the first round of the NCAA Div. III playoffs at Springfield...Appeared in the 66th Cortaca Jug Game at Ithaca.

2024: Sean played in one game for the Red Dragons...Made three tackles, two solo, in a road win over Hilbert.

2023: Played in a road win at Hartwick and recorded one tackle.

High School: A 2023 graduate of Jamestown...Two-year starter in football...Earned second team all-state honors as a junior and first team all-state accolades as a senior...Team won a sectional title...Two-year starter in baseball.

Other: Son of Kolene and John O'Brien...Has two siblings, Daniel and Kylie (twin sister)...Cousin Cordell O'Brien played football at Mercyhurst from 2018-21...Lists among his greatest thrills scoring a touchdown at Highmark Stadium, the home stadium of the Buffalo Bills.