As a sophomore, he compiled a record of 16-2 during the regular season, with a Keystone Classic title[8] and a third-place finish at the Southern Scuffle after being defeated by his teammate Shakur Rasheed.

[11] In the postseason, he made his way to the first-place finish at the Big Ten Championships with wins over the #6 and #7-ranked wrestlers and top-ranked Gable Steveson at the finale.

[12] At the 2019 NCAA championships, he got the victory over multiple ranked wrestlers including Steveson in the semifinals to make his way to the finale.

[13] In his final season, he had posted a record of three wins and no losses but was affected by a shoulder injury while competing at a freestyle event and subsequently announced his career as a collegiate wrestler was over.

[17] Cassar made his senior level debut on December 22 at the US nationals, in an attempt to earn a shot at the Olympic Trials.

[18] He dominantly won his first two bouts to reach the semifinals,[19] where he was forced to abandon the match due to a shoulder injury and forfeited his next contests too.