Gundy is a terrific actor, or the CU player is a terrific actor. At least one of the two of them is very, very good at acting. I doubt they are BOTH lying, because that would be super weird to have one guy lying about the other guy using racist name calling, while the other actually DID use racist name calling (unknown to the first guy) but is lying and saying he did not use racist name calling. You rarely see that sort of thing.
I supposed we haven't ruled out mistaken identify. How many QB's did OSU play at one time back then? Wishbone full of QB's? I was young then, so I may have missed that.
If I were a betting man, I'd bet that Gundy is a racist piece of crap who is lying, but that's just because I saw pictures of him wearing a t-shirt for a news brand that racist pieces of crap love.