Guillermo Gallardo is a 6'3", 320-pound defensive lineman for the Illinois Fighting Illini. From Bloomington, Illinois, he attended Normal Community High School, where he recorded 28.5 tackles, three sacks, and six tackles for loss as a senior, along with six quarterback pressures, one forced fumble, and two fumble recoveries. Gallardo spent his first two seasons at New Mexico Military Institute, appearing in nine games in 2023 with 25 tackles and 1.0 tackle for loss, then playing in one game as a freshman in 2022. He redshirted in 2024 and earned Academic All-Big Ten honors that year. Now a senior, Gallardo is returning to the roster for Illinois.