Education
Born in Milwaukee, Wisconsin, but raised in Las Vegas, Nevada, Polster attended Southern Illinois University Edwardsville where he played for the Southern Illinois University Edwardsville Cougars.
Born in Milwaukee, Wisconsin, but raised in Las Vegas, Nevada, Polster attended Southern Illinois University Edwardsville where he played for the Southern Illinois University Edwardsville Cougars.
Early career
While with the university, Polster earned many honors including 2014 NSCAA All-West Region First Team selection and 2014 NSCAA Scholar All-America First Team selection. Chicago Fire
On January 15, 2015, Polster was selected as the 7th overall pick by the Chicago Fire during the 2015 Master of Library Science SuperDraft and was signed to a contract on February 4. During his rookie season for the Fire, Polster has played an important role as a holding midfielder, drawing praise from league commentators for his precise passing and defensive capabilities, he earned recognition as Soccer by Ives "Rookie of the Week" on three occasions during the 2015 season.
International
In January 2016 Polster received his first call up to the senior United States squad for friendlies against Iceland and Canada.