Delaney attended Harker Heights High School in Texas, ultimately choosing to play in college for coach Joe Scott at Denver.[1] He averaged 2.4 points and 1.7 rebounds per game as a freshman.[2] However, after his freshman season he chose to transfer to Sam Houston State, where he rejoined his identical twin brother Josh to form a formidable three-point shooting duo.[3] For his senior season, Delaney averaged 13.4 points and 5.5 rebounds per game and led the Bearkats to a regular season Southland Conference title.[4] Delaney was named first-team All-conference and the Southland Player of the Year for his efforts.[5]
After going undrafted in the 2019 NBA draft, Delaney signed with Raiffeisen Flyers Wels of the Austrian Basketball League on August 19, 2019.[6] Delaney averaged 13.7 points, 6.9 rebounds, 2.3 assists and a steal per game.[2] On August 6, 2020, he signed with Phoenix Hagen of the German ProA league.[7] Delaney averaged 11.8 points, 3.1 rebounds and 1.5 assists per game but left the team in February 2021. On September 9, 2021, he returned to Raiffeisen Flyers Wels.[8]