Max Duggan from Lewis Central High School was rated a 4-star recruit by ESPN and handed a 4-star grade by 247 Sports. After high school, Duggan opted to join TCU.

In 2019 as a freshman Duggan saw action in 12 games for the Horned Frogs as he threw for an excellent 2075 yards on 341 attempts with a completion percent of 53.4 for an average of 6.1 yards per pass, with a solid 15 TDs, while taking 27 sacks, and a solid QB rating of 74.4. He added 106 runs for a total of 709 yards at an average of 6.7 per run.

In 2020 as a sophomore he played in 10 games as he passed for a solid 1802 yards on 242 attempts with a completion percent of 59.9 for an average of 7.4 yards per pass, with a solid 10 TDs, while also taking 21 sacks, and putting up a solid QB rating of 89.9. He made 100 runs for a total of 649 yards at an average of 6.5 per rush.

As a junior in 2021 Duggan played a total of 10 games. He passed for an excellent 2040 yards on 228 attempts and put up a completion percentage of 63.6 for an average of 8.9 yards per attempt, with a solid 16 TDs, and allowing 20 sacks, with an excellent QB rating on the year of 104.8. As a runner he logged 89 runs for a total of 497 yards at an average of 5.6 per run.

In 2022 as a senior Duggan saw action in 13 games as he threw for an outstanding 3320 yards on 369 attempts with a completion percent of 64.8 for an average of 9.0 yards per pass, with an outstanding 30 TDs, while taking 24 sacks, and totaling a QB rating of 116.1. He added 97 runs for a total of 580 yards at an average of 6.0 per run.