Saari was raised in the Kansas City area and attended Oak Park High School.
He was diagnosed with testicular cancer at the age of 15 and underwent several months of chemotherapy before returning to the high school's soccer team.
His advanced attacking role with the club yielded nearly a point a game and showcased his creative ability in the final third.
[4] On March 22, 2017, Saari signed his first professional soccer contract, joining USL club Seattle Sounders FC 2.
[6] On September 13, 2018, Saari was released from Seattle Sounders FC 2 having played in 39 matches over two seasons for S2 and recording four goals and six assists.