Hartage was a member of the Northwestern Wildcats for four seasons. As a senior, he was named first-team All-Big Ten Conference by the media and to the third-team by the league's coaches after recording 51 tackles, 13 pass breakups, two interceptions and a fumble recovery.[1] He finished his collegiate career with 172 total tackles, ten interceptions, and 39 passes defended.[2]
Hartage was signed by the Miami Dolphins as an undrafted free agent on April 27, 2019.[3] He was waived on August 31, 2019 as part of final roster cuts, but was re-signed to the team's practice squad.[4] Hartage was promoted to the Dolphins' active roster on December 1 and made his NFL debut the same day against the Philadelphia Eagles.[5] He was waived on December 3 and re-signed to the practice squad.[6] He was promoted back to the active roster on December 14, 2019.[7] Hartage was waived by the Dolphins on April 26, 2020.[8]
Hartage was claimed off waivers by the New York Giants on April 28, 2020.[9] He was waived/injured on September 5, 2020,[10] and subsequently reverted to the team's injured reserve list the next day.[11] He was waived with an injury settlement on September 10.[12] He was re-signed to the Giants practice squad on October 27.[13] He was elevated to the active roster on November 2 and November 7 for the team's weeks 8 and 9 games against the Tampa Bay Buccaneers and Washington Football Team, and reverted to the practice squad after each game.[14][15] Hartage was promoted to the active roster on November 13.[16] Hartage was waived on December 1, 2020,[17] and re-signed to the practice squad two days later.[18] On December 11, 2020, Hartage was signed to the active roster.[19] On December 19, 2020, Hartage was waived by the Giants and re-signed to the practice squad three days later.[20][21] He signed a reserve/future contract on January 4, 2021.[22] He was waived/injured on August 24, 2021 and placed on injured reserve.[23] He was released on September 2.