As a freshman in 2020, Haladay redshirted and appeared in four games, recording no statistics.[3] In week five of the 2021 season, he had a breakout game tallying ten tackles with one going for a loss, a fumble recovery, and a forced fumble, as he helped Michigan State beat Western Kentucky 48–31.[4] In week seven, Haladay intercepted a pass thrown by Jack Tuttle and returned it 30 yards for a clutch touchdown, as helped the Spartans beat Indiana 20–15.[5] In the Spartans season finale, Haladay racked up 11 tackles with 2.5 being for a loss, 0.5 sack, and a forced fumble, as helped Michigan State survive Penn State 30–27.[6] Haladay was named the defensive MVP of the 2021 Peach Bowl after recording a team-high 11 tackles and a 78-yard interception return for a touchdown to secure the Spartans' 31–21 victory.[7] Haladay finished the 2021 season with 96 tackles with five going for a loss, 0.5 sack, a pass deflection, two interceptions, a fumble recovery, two forced fumbles, and two touchdowns, earning Freshman All-American honors.[8][9]
In the 2022 season opener, Haladay recorded a strip sack fumble and an interception in a 52–0 victory over Akron.[10] In week ten he totaled nine tackles with 3.5 being for a loss, as he helped Michigan State beat Illinois.[11] For his performance, Haladay was named the Big Ten defensive player of the week.[12] The following week, he notched 19 tackles with one going for a loss, as helped the Spartans beat Rutgers 27–21.[13] Haladay was named the Big Ten defensive player of the week for the second straight week.[14] He finished the 2022 season with 120 tackles with 11 going for a loss, 1.5 sacks, a fumble recovery, and a forced fumble.[15] Haladay was named to the Second Team All-Big Ten by both the coaches and by the media.[16][17] Ahead of the 2023 season, he was named to watch lists of multiple awards, such as the Butkus Award, the Bronko Nagurski Trophy, and the Chuck Bednarik Award.[18][19][20]
