Career
College and Amateur
Hamer spent his entire college career at Gonzaga University. He made a total of 69 appearances for the Bulldogs and tallied six goals and nine assists. He also played in the Premier Development League for Portland Timbers U23s, Puget Sound Gunners Football Club and Kitsap Pumas.
Professional
On June 25, Hamer, along with Hiroki Kobayashi and Mike Ramos, was loaned from Kitsap to USL club Seattle Sounders Football Club 2.
He made his professional debut that same night in a 1–0 victory over Real Monarchs Salt Lake City.