At the FIL World Luge Championships, Prock memenangkan 13 medali, termasuk lima emas (Men's single: 1987, 1996; Mixed team: 1996, 1997, 1999), empat perak (Men's single: 1990, 1997; Mixed team: 1991, 1993), dan empat perunggu (Men's single: 1995, 2001
Tim campuran: 1995, 2001).