As a true freshman at Houston in 2017, Parish redshirted.[5] Although recruited as a linebacker, his position was quickly changed to defensive end.[3] He appeared in all 13 games the following year, totaling 21 tackles.[6] He played 12 games in 2019, starting four while posting 38 tackles, 5.5 tackles-for-loss and 2.0 sacks.[6] In the COVID-19-shortened 2020 season, Parish played in all eight games, five of which he started, and tallied 25 tackles, 5.5 tackles-for-loss, and 3.5 sacks, the latter two statistics ranking third on the team.[6] Against South Florida that year, he returned a fumble 85 yards for a touchdown.[7]
In 2021, Parish started all 14 games and was named second-team All-American Athletic Conference (AAC) after recording 56 tackles, 12.5 tackles-for-loss and 5.5 sacks.[8][9] At the start of 2022, he underwent hip surgery and later surgery for a broken bone on his hand, the latter requiring him to play with a club on his hand.[1] He was named team captain and in the second game of the 2022 season, against Texas Tech, Parish set the AAC record with 4½ sacks, additionally posting 6.5 tackles-for-loss and a forced fumble, afterwards being named the national defensive player of the week.[10][11] However, he then suffered a season-ending torn bicep injury in the fourth game of the year.[12] He had posted 20 tackles, 5.0 sacks and 8.5 tackles-for-loss through that point of the season, ranking third-best nationally in the latter two.[12] Parish was able to return in time to play in the East–West Shrine Bowl, at which he changed his position from defensive end to fullback.[3]
On January 22, 2024, it was announced that Parish had signed with the Toronto Argonauts as a defensive lineman.[19] In the 2024 season, Orimolade played in all 18 regular season games, starting in five, where he had 21 defensive tackles, five special teams tackles, six sacks, and two pass knockdowns.[20] He also played in all three post-season games, including the 111th Grey Cup where he didn't record a statistic, but shared in the Argonauts' 41–24 victory over the Winnipeg Blue Bombers.[20][21]
Personal life
Parish won an eating competition between his Cougars teammates by eating 7 lbs. (3.175 kg) of steak in one sitting.[22]