[3] In his first start he completed 20 passes for 205 yards with a touchdown and three interceptions in a win over Texas State.
[4] In week 7 of the 2018 season, Sitkowski completed just two of his 16 pass attempts for eight yards and four interceptions in a loss to Maryland.
Sitkowski completed 23 of 33 passing attempts for 304 yards and a touchdown with an interception in a 30–16 loss to Boston College.
[10] However, Sitkowski decided to enter the NCAA transfer portal and return to play for the Scarlet Knights in 2020.
[16] He made his Illinois debut in week one after starter Brandon Peters went down with an injury and completed 12 of his 15 passes for 124 yards and two touchdowns, as he helped lead the Fighting Illini to a 30–22 win over Nebraska.
[24] After the 2022 season, Sitkowski joined the Illinois football coaching staff as a graduate assistant.