Per our Catholic Herald:
"Stripes" the clown is Pallottine Fr. Greg Serwa.
"Snaps" the clown is Susanne Malestic.
Update: And there's the clown ministry at St. Paul the Apostle Church in Racine.
Update 2: The presiding clown at the February 1984 Clown Mass at St. Agnes Church was Fr. Edward Hussli.