Terry Bradshaw -- I'm NOT a Racist ... But Jimmy Johnson Does LOVE Chicken

Terry Bradshaw is "really upset" he's being accused of racism after comparing a Reggie Bush TD run to someone chasing a "bucket of chicken" ... but tells TMZ there's a simple explanation -- Jimmy Johnson is a freak for chicken!

We just spoke to FOX NFL analysts Johnson and Bradshaw ... who said he was unaware there was any controversy until friends started calling him this morning.

Bradshaw explained it's a Sunday tradition for JJ to order a bucket of KFC after they wrap the pregame show -- and yesterday was no exception. Bradshaw says Johnson "won't share it with anybody" ... and everyone on set rips him for it.

Johnson backed up the bucket tale ... telling us, "Every Sunday I get 4 pieces of fried chicken, dark meat, and I eat it right there on the set."

Bradshaw tells us yesterday's chicken comment was an innocent shot at one of his co-stars ... something he commonly does during highlights.

TB says, "I'm having a hard time with this ... because that's not me. I never put those two things together because I don't think like that."

But Bradshaw adds, "I understand why people are upset because they don't know the inside story."