Trash talk has been a fundamental part of the run-up to the August 26 match between undefeated boxer Floyd Mayweather and Mixed Martial Arts champion Conor McGregor. A few weeks ago, Mayweather turned his attention to the weight of their fight gloves on social media. He proposed the pair battle while wearing gloves that weigh 8 ounces each, instead of the usual 10-ouncers required for their weight class, which is 154 pounds. McGregor's response was positive (and obscenity laden), and the Nevada State Athletic Commission, which is sanctioning the bout, has granted the opponents a one-time exception to use lighter gloves. What this means, however, is a topic of much debate in the boxing community. Those 2 ounces have caused a big stir, especially in a time when the scientific data about brain injuries in sports grows more troubling.