Eh, kinda glad that Tiger was hammered, cause I didn't buy that claim, and I'll explain why.
Grounder is a henchmen character of the sonic cartoon shows, who works for Dr. Robotnik. See, there was two types of sonic shows. One was the happy-go-lucky sonic cartoon, and the other was the slightly darker side version of sonic (That one featured a bunch of characters like Sally, Rabot, Rotor, etc.) Grounder came from the happy-go-lucky one, and he's partners with Scratch.
Now then, this game we're playng seems to be playing from the Sonic the Hedgehog MOVIE, which is unrelated to either of the two because it was made in japan (while the other two were western cartoons).
so....yeah, Tigerwoods claimed a bad guy character.