The Mississippi Athletic Commission fined Bellator MMA light heavyweight Quinton Jackson $10,000 last week for shoving his opponent during an official weigh-in.
MAC chairman Jon Lewis confirmed the fine to ESPN.com on Monday, after it was first reported by MMAFighting.com.
Jackson (35-11) pushed Muhammed Lawal in the chest shortly after they each made weight in Southaven, Mississippi, on Friday. According to Lewis, he immediately informed Jackson that he would be fined for it, at which point the fighter became irate.
"Pushing and shoving only happens in the ring, otherwise it's assault" Lewis said. "We don't tolerate it. We look at it as comparable to a personal fine in the NFL.
"When I addressed him about it, he 'mother-effed' me to the core. Truth be known, [the fine] would have been much more severe if he had addressed one of my employees. He deserved something bigger, but I didn't want it to look personal since it was me."
Jackson eventually apologized to Lewis. At one point, the commission considered removing him from the pay-per-view card, which he was scheduled to headline.
"That was a consideration, and do I think it would have been appropriate?" Lewis said. "Yes, I do."
The fine would have been closer to $2,000, Lewis said, if not for Jackson's reaction. The $10,000 fine was taken directly from Jackson's fight purse.
Jackson, 35, went on to defeat Lawal (12-4) via unanimous decision in a close bout.
"You get worried because you know the judges knew [Jackson and the commission] had some heat," Lewis said. "You worry about that carrying over into how they score the fight, but obviously it didn't."