Stadler started out playing youth soccer for the local club Polonia SC which his grandfather had founded after immigrating over to America from Poland during World War II.

[1] After playing for his high school he received a scholarship to join the George Washington Colonials men's soccer college team.

[3] After graduating he could not even find a trial with an American club and instead had to work as a concierge until a friend contacted him about the opportunity to play for Färila IF in the sixth tier of Sweden.

At the end of his first season with Landskrona the club was relegated but the following summer he returned to Superettan when he was bought by league leaders Östersunds FK.

He also has a brother Timothy Stadler, who received a master's degree in geophysics from Michigan State University, researching with Dr. Masako Tominaga.