Question: Who founded the boxing promotion company which Floyd Mayweather, Jr exercising a provision in his contract
Sentence (from "Mayweather Promotions"): Mayweather Promotions, LLC is a boxing promotional firm founded by five-division world and twelve-time world champion Floyd Mayweather, Jr. in 2007 after exercising a provision in his contract with Bob Arum and Top Rank, that allowed him to become a free agent for the price of $750,000.
Relevant evidence: Yes