Jessica McCaskill
McCaskill is one of the most talented female boxers today but she’s a sore loser. In 2017, she found Katie Taylor in London for the WBA lightweight strap. The legendary Irish champion outboxed her in a dominant decision victory. McCaskill was a game opponent but there was a clear skill gap (via Irish Mirror).

However, the former investment banker never forgave Taylor for this loss. Now she takes every opportunity to criticize the Irish woman and downplay her achievements. McCaskill outraged diehard fans when she worked as a co-commentator for the iconic Taylor vs. Serrano fight. She repeatedly gave biased views about Serrano and didn’t say a single positive point about Taylor.