On September 3, 2017, he posted a lengthy, departing message after singing with Pentatonix for the final time. "Tonight was my last show with PTX. It is a night I will never forget," posted Kaplan ...

Pentatonix was formed in 2011 shortly before ... The celebrated Texas-based a cappella group, also known as PTX, is composed of high school pals Mitch Grassi, Scott Hoying, and Kirstin Maldonado ...