After toppling Canelo Álvarez in the fight of the year, the undefeated boxing champion has earned more than $100 million in the ring. Now 38, and with Warren Buffett in his corner, he is staring down the ultimate opponent—Father Time.

One of the most dominant boxers of this era, Terence Crawford's nickname is known outside the sport. Here's a breakdown of his career, and how he might have earned the nickname "Bud".