Shirley Crabtree Jr. (14 November 1930 – 2 December 1997), better known as Big Daddy, was an English professional wrestler. He worked for Joint Promotions and the original British Wrestling Federation. Initially appearing on television as a heel, he teamed with Giant Haystacks. After splitting with Haystacks, he became a fan favourite and the top star of Joint Promotions from the late 1970s to the early 1990s.

Shirley Crabtree Jr., was the first child of a blacksmith's daughter and weighed about twelve pounds at birth. He was given the name Shirley, like his father, who was a professional player of rugby league for Halifax R.L.F.C. and part of the team that won the Challenge Cup at Wembley in 1931. Shirley was traditionally a man's name but had become popular as a girl's name following the Charlotte Brontë novel, Shirley. In the 1930s, the name was especially associated with the child movie-star, Shirley Temple, and so the boy was teased and bullied at school. His father abandoned the family when his son was seven, and so the bullying toughened up the young Crabtree in the manner portrayed by "A Boy Named Sue",

Well, that song described me down to a tee now I look to the past and think about it, and after a while I started to get very angry. The desire to defend myself became overwhelming and the bullies' days were numbered because I hit back twice as hard.

Prior to becoming a wrestler, Crabtree served in the Coldstream Guards, and worked as a lifeguard in Blackpool.

Shirley Crabtree Jr., decided to follow in the footsteps of his father, Shirley Crabtree Sr., becoming a professional wrestler in 1952. He first became popular in the late 1950s, and early 1960s as a blue-eye billed as "Blond Adonis Shirley Crabtree." He won the European Heavyweight Championship in Joint Promotions and a disputed branch of the British Heavyweight title in the independent British Wrestling Federation before he quit in 1966 following a (non-kayfabe) campaign of harassment at wrestling shows by former champion Bert Assirati. He retired for roughly six years. During the 1960s Crabtree owned an underground nightclub in Bradford which is now called Sunbridge Wells.

In 1972, Crabtree returned to Joint Promotions as a villain with a gimmick of the Battling Guardsman based on his former service with the Coldstream Guards. It was during this period that he made his first appearances on ITV both on World of Sport and on the midweek late evening wrestling slot.

Not long afterwards, Crabtree's brother, Max, was appointed as Northern area booker with Joint Promotions and began to transform Crabtree into the persona for which he would be best remembered. Based originally on the character of the same name played by actor Burl Ives in the 1958 first screen adaptation of Tennessee Williams' Cat on a Hot Tin Roof, 'Big Daddy' was first given life by Crabtree in late 1974, initially still as a villain. The character's leotards were emblazoned with just a large "D" and were crafted by Crabtree's wife Eunice, from the chintz settee of the family home. The character first gained attention in mid-1975 when he formed a tag team with TV newcomer Giant Haystacks and together they became notorious as 'villains' crushing blue eye opponents. During this period, Daddy was cheered by the audience, for the first time since his comeback, when he entered into a feud with masked villain Kendo Nagasaki, especially when he pulled off Nagasaki's mask during a televised contest from Solihull in December 1975 (although the unmasked Nagasaki quickly won the bout moments later).

By the middle of 1977, Big Daddy had completed his transformation into a blue eye, a change cemented by the breakdown of his tag team with Haystacks and a subsequent feud between the two which would last until the early 1990s. A firm fans' favourite particularly amongst children, Big Daddy came to the ring in either a sequinned cape or a Union Flag jacket and top hat. In addition to his feud with Haystacks, Daddy also feuded with Canadian wrestler "Mighty" John Quinn. He headlined Wembley Arena with singles matches against Quinn in 1979 and Haystacks in 1981, as well as a tag match in 1980 with Wayne Bridges against Quinn and Yasu Fuji. Later in the 1980s he feuded with Dave "Fit" Finlay, Drew McDonald and numerous other villains.