FRESHMAN
- Second on the team with eight appearances in shortened season
- Struck out 17 in just 8.1 innings of work - tops among the teams relievers and the highest K/IP ratio on the team
- Did not allow an earned run in seven of his eight appearances
- Had a monstrous game in the final weekend of the shortened season, striking out seven with no walks in 3.2 innings of work against Fresno State while allowing just one hit and earning his first career win in the process
- One of the top pitchers in the state of Illinois pitching for Providence Catholic High School and received an honorable mention spot on the Chicago Tribune 2018 Daily Southtown Baseball All-Area Team
- An honorable mention as a senior in the Quad-City Times All-Western Illinois baseball team
- Allowed more than two runs in just one start during his senior year, finishing with a 2.47 ERA and 68 strikeouts to earn a spot on the Herald-News Baseball All-Area First Team
- Struck out 15 in a Class 4A Lockport Sectional semifinals playoff appearance in his senior year to help his team advance to the 2019 IHSA Illinois Baseball State Tournament
- Named to the Chicago Tribune's Southland Top 25 Players to Watch for the 2018 season and played in the Class 4A Providence Regional Championship as a junior in 2018
- In 48 1/3 innings as a junior, Barnett allowed 31 hits and 16 walks and struck out 56. He had a 4-2 record with a 2.03 ERA
- Led his team on the mound to the 4A Andrew Regional Championship as a sophomore in 2017
- High school teammate of fellow Class of 2019 Signee Alex Helmin.
- Perfect Game lists him as the No. 14 right-handed pitching prospect and the No. 43 overall prospect in the state of Illinois; a Top-500 ranked player nationally according to Perfect Game; rated as the No. 7 right-handed pitching prospect and the No. 17 overall prospect in the state of Illinois by Prep Baseball Report; PBR also tabbed him as a Top-500 overall prospect and the No. 169 best prospect at his position (RHP).
- 2018 Preseason Underclass All-American High Honorable Mention; 2017 Preseason Underclass All-American Honorable Mention; a member of three All-Tournament Teams on the prep baseball circuit