Phillip Jack Brooks better known by his ring name CM Punk, is an American professional wrestler and wrestling color commentator currently signed to World Wrestling Entertainment (WWE) on its Raw brand, where he is the leader of Nexus.

Punk initially came to prominence through his career on the professional wrestling independent circuit, primarily as a member of the Ring of Honor (ROH) roster, where he won the ROH Tag Team Championship, ROH World Championship, and was the first head trainer of the ROH wrestling school. In 2005, Punk signed a contract with WWE and was sent to its developmental promotion, Ohio Valley Wrestling (OVW), where he won every championship available in the promotion.

Throughout his career, Punk has consistently used the gimmick of being straight edge, a lifestyle he follows in real life. Depending on Punk's alignment as a crowd favorite or villain, he emphasizes different aspects of the culture to encourage the desired audience reaction.