The Thunder signed Morrow as a bench outside shooter. He played alongside Kevin Durant and Russell Westbrook as they were a title contender. He averaged 7.7 points and shot 39.4% from 3 on 3.6 attempts in his time in OKC. He complimented the high-end talent and fans for why he loved his time there.

Flagler averaged 1.7 points on 25.2% shooting in his two seasons on the Thunder. While he struggled to find his shot at the NBA level, he was a top-notch scorer at the G League. His outside shot helped the OKC Blue bring home the 2024 G League championship.