Totsch signed with United Soccer League club Rochester Rhinos on March 13, 2015.
He would appear in 22 of Rochester's 28 regular season matches as well as one match in the U.S. Open Cup.
 He first professional goal on September 19 in a 3–2 win against the New York Red Bulls II; his only goal of the season.
He would also play in two of Rochester's three USL Cup matches helping Rochester to both the USL Regular Season and USL Cup championships.
Totsch signed with United Soccer League club Rochester Rhinos on March 13, 2015. He would appear in 22 of Rochester's 28 regular season matches as well as one match in the U.S. Open Cup.  He first professional goal on September 19 in a 3–2 win against the New York Red Bulls II; his only goal of the season. He would also play in two of Rochester's three USL Cup matches helping Rochester to both the USL Regular Season and USL Cup championships.
Sean Totsch