Option declined following 2018 season.
Ketterer re-joins Crew SC in 2018 to fight for the backup goalkeeping position.
COLLEGE: Ketterer played three seasons at Bradley University, making 51 appearances (16 starts). The goalkeeper earned All-Missouri Valley Conference and MVC Scholar-Athlete Honorable Mentions during his senior season, a season that also saw him be named to the ProRehab Aces Soccer Classic All-Tournament Team (2016). The previous year, Ketterer was named to the NSCAA Scholar All-North/Central Region Second Team (2015). The 23-year-old goalkeeper also won the ProRehab Aces Soccer Classic Defensive Most Valuable Player award during his first year as a starter for the Bradley University Braves (2014).