McCarthy, a head referee for hundreds of bouts in major MMA promotions dating back to 1993, explained that grabbing the shorts of an opponent is illegal, as is holding any part of an opponent's clothing.
It's fairly common knowledge among fight fans that grabbing the shorts isn't allowed, but not many knew the rule regarding pulling at an opponent's sports bra.
Since female MMA is fairly new within the UFC, the rule isn't known by most UFC supporters. McCarthy says it's an illegal tactic to grab at any part of an opponent's clothing, including the sports bra.
"No,u can't hold ur opp clothes“@EricHolden: Grabbing the shorts of opponent is illegal, but what about yanking on the bra in a female bout?" McCarthy tweeted.
Tate, 27, briefly had top position in the opening frame of the fight, and it seemed that she gave a slight tug on Rousey's top in order to create a distraction.
McCarthy says if that was indeed the case, it would be an illegal move on Tate's part.
Mario Yamasaki was the ref in charge of the UFC 168 co-main, and he apparently did not see Tate grab at Rousey's top at all.
For anyone wondering why Tate would even think about tugging at Rousey's sports bra, they need only to look back at the star judoka's comments following UFC 157.
After Rousey's fight with Liz Carmouche, she admitted she was more concerned about a wardrobe malfunction than her opponent's neck crank that nearly ended the fight.
"I was thinking about my bra, actually. I kept thinking, I didn't order this one myself, so they gave me my weigh in bra for the fight," Rousey said. If you look back, I was adjusting myself at one point while she was on my back. Multitasking [laughs]!
"I was trying just to ignore everything until I was out there. It was weird -- I was in there just yesterday so it felt like a familiar place. It didn't seem odd at all.... I think I was less nervous [for this fight]. I think I was most nervous for the Julia Budd fight, way back, I don't know why I was so nervous for that one. On the ground I feel so comfortable -- I don't ever feel like I'm in danger -- so I don't mind taking a lot of risks. I felt fine with her on my back, I was thinking more about keeping my sports bra up while she is trying to choke me."