Fontana began his recreational youth league development with Kirkwood Soccer Club in New Castle, Delaware at age 4.[1] By age 10, Fontana had his first participation with the Philadelphia Union Academy and became a full-time participant in 2014.[1]
The next season, Fontana saw an additional 11 appearances for Steel FC, and even earned an appearance for the Union during their summer friendly against Swansea City.[3]
On July 17, 2017, Fontana signed a homegrown player contract with Philadelphia Union. Fontana became an active Union player on January 1, 2018.[4]
On March 3, 2018, Fontana made his debut for Philadelphia Union, starting in the season opener against New England Revolution. He scored the opening goal of the season against the Revolution which was ultimately the game-winner.[5] Fontana became the first Union homegrown player to score a brace when he came into the match as a substitute against the New England Revolution in September 2020.[6][7] Fontana became a standout in the substitution role and finishing the 2020 season scoring six goals in 523 minutes of play, contributing the Union's first major trophy in the 2020 Supporters' Shield.[8][9]
In the Union's debut season in the CONCACAF Champions League, Fontana became the first homegrown player to score a Champions League goal in a 4–0 home victory over Deportivo Saprissa, advancing to the quarterfinals.[10] Despite being a starter at the beginning of the 2021 season, Fontana missed nearly two months due to concussion protocol. Fontana's contract concluded at the end of the 2021 season finishing with 51 appearances and 12 goals for the Union.[11]
In February 2022, Fontana officially signed for Serie B club, Ascoli.[12] On January 31, 2023, Fontana's contract with Ascoli was terminated by mutual consent.[13]
Fontana was born in the United States and is of Italian descent.[15] Fontana has appeared in the 2018 CONCACAF U-20 Championship representing United States.
