Previously, Donovan had played four years of varsity soccer at Conestoga High School, where he was a three-time First Team All-Main Line player, leading Conestoga to a Central League championship in each of his last three seasons, and was named the league's MVP as a senior.
He led the team in scoring in each of his final three years, scoring 56 goals as a senior in 2017, which earned him First Team All-State and All-American honors as a senior, and was named the Philadelphia Daily News Local Player of the Year.
He subsequently signed with MLS Next Pro side Philadelphia Union II on February 1, 2022, ahead of the league's inaugural season.
[10][11] On June 17, 2022, Donovan was signed by Philadelphia Union, and joined the club's Major League Soccer roster.
[12] Philadelphia sent Chicago Fire FC $50,000 of General Allocation Money to move up to the top spot of the MLS Waiver Order to select him.