[1][2] He is a cousin of former National Football League (NFL) player Aaron Ross, a Super Bowl champion with the New York Giants.

[6] The following year, he started all 10 games in which he appeared, missing three due to injury, totaling 20 tackles, including two for a loss, with one sack and two pass breakups.

[4][7] In 2020, he remained a starter and was named honorable mention all-conference after leading the team's defensive line with 32 tackles and eight TFLs, additionally posting four sacks and five quarterback hurries.

[2][8] Lacy earned a second honorable mention all-conference selection in 2021, additionally being named to their first-team All-Academic squad as he posted 34 tackles, 11 for-loss, and 3.5 sacks.

[4] His senior season in 2022 was cut short due to injury, and he finished it with 17 tackles, five quarterback hits and three sacks.