Andika mwendelezo wa aya hii - Katika FIL World Luge Championships, Prock alishinda medali 13, ikiwa ni pamoja na dhahabu tano (Wanaume single: 1987, 1996
; Timu mchanganyiko: 1996, 1997, 1999), fedha nne (waume single: 1990, 1997; Timu mchanganyiko: 1991, 1993), na shaba nne (waume single: 1995, 2001; Timu mchanganyiko: 1995, 2001).