Terence Allan "Bud" Crawford (born September 28, 1987) is an American professional boxer. He has held multiple world championships in three weight classes, including the WBO welterweight title since 2018. Previously he held the WBO, Ring magazine and lineal lightweight titles from 2014 to 2015; and the unified WBA (Super), WBC, IBF, WBO, Ring and lineal light welterweight titles between 2015 and 2017.

In August 2017, Crawford had a short reign as the undisputed light welterweight champion, prior to moving up to welterweight. He was the most recent undisputed titlist at light welterweight since Kostya Tszyu in 2004. Crawford also became the first male boxer to simultaneously hold all four major world titles in boxing (WBA, WBC, IBF and WBO) since Jermain Taylor in 2005, and is one of only four male boxers in history to do so.

As of November 2020, Crawford is ranked as the world's best active boxer, pound for pound, by ESPN; third by The Ring and the Transnational Boxing Rankings Board (TBRB); and fifth by BoxRec. He is also ranked as the world's second best active welterweight by The Ring and BoxRec, and third by the TBRB and ESPN. Crawford was named Fighter of the Year by the Boxing Writers Association of America in 2014, and by ESPN in 2014 and 2017.

Stylistically, Crawford is known for his exceptionally fast hand speed, ring IQ, punching power, counter-punching abilities and defensive skills, as well as his ability to comfortably switch hit from orthodox to southpaw.