History of Caddies at the Masters
From the The Augusta Chronicle:
"It was a changing time": Caddie conversion in 1982 sends Masters down new path
A press release from Augusta National Golf Club in 1982 changed a Masters Tournament tradition forever.
Starting with the next year’s Masters, less than five months away in 1983, participants would no longer be required to use Augusta National club caddies, who were Black. The so-called ban on the use of outside caddies, most of whom were white, was lifted, at the tournament.
It had been a tradition since the inception of the Masters in 1934 that players use the “local caddies” from the club.
The change was hailed by most tour pros, who had been pushing for it. In the release, club chairman Hord Hardin, said as much. Read more here