[2] Kolar committed to play college football at Iowa State going into his senior year over offers from Air Force, Army and Stephen F. Austin.
[5] As a redshirt freshman, he played in all 13 of Iowa State's games and finished the season with 11 receptions for 137 yards and three touchdowns and was named second-team All-Big 12 Conference by the league's coaches.
[10] Kolar graduated from Iowa State in the fall of 2020 with a 3.99 cumulative GPA in mechanical engineering,[11] and in 2021, he was awarded with the William V. Campbell Trophy, known as the "academic Heisman".
In Week 18 against the Cincinnati Bengals, he recorded his first career catch as part of a day in which he caught four passes for 49 yards from Anthony Brown in a 16-27 loss.
Andrews would suffer a severe ankle injury in the Ravens' Week 11 34-20 win over the Cincinnati Bengals and miss the rest of the regular season.
In Week 17 against the Miami Dolphins, Kolar caught his first career touchdown on a 19-yard reception from Tyler Huntley in the fourth quarter of a 56-19 blowout win.