Jockey Jimmy Nickels is referred to alternatively as Jimmy Nicholas by both Shawn and Henry Spencer. However, when they first arrive at the track, Gus says they're there to see jockey Jimmy Nickels, and Henry says "You must mean Jimmy Nicholas," implying that either Nickels is a nickname, or Jimmy changed his name at some point. The names are used interchangeably throughout the episode. See more
Jimmy, what is it exactly you'd like for us to do?
Well, uh... one of our friends from our old school told me about your company. And even though it sounds kinda gay, I thought I could hire you to come down to the track and maybe, uh... psychically figure out what's wrong with the horses.
Burton 'Gus' Guster
Okay, first of all, you ride on the backs of mounts while carrying a whip. That's MUCH gayer than what we do!