No release yet, but the UCLA athletics official twitter announced it. EDIT: Here's the release
The main paragraph that sums it all up from the release:
Scates will retire after 50 years of service at UCLA with a nation-leading Division I record of more than 1,200 victories. To date he has captured 19 NCAA championships, 21 overall national championships, 24 conference titles and compiled a legacy unmatched by few college coaches in any sport. In 49 seasons, Scates has coached 52 different first-team NCAA All-Americans, 44 U.S. National Team members, 27 Olympians, 26 USVBA All-Americans and seven collegiate Players of the Year.
It's hard to overstate what Scates did in his career. I hope he gets some mainstream publicity in his final season next year and that he goes out a winner to give him a nice round number of 20 NCAA championships.