Looney averaged 11.6 points and 9.2 rebounds for the Bruins in 2014-15. SI.com's Chris Mannix pegged Looney as the draft's 13th best prospect on his most recent NBA Big Board last month.
"This was a really tough decision for me because there were so many positives both ways," Looney said in a statement. "My time at UCLA has been unbelievable, and I know I'll be a Bruin forever. But playing in the NBA is a dream I've had for so long, and this feels like the right time to pursue that dream and make the transition to the next level."
Looney, a 6-foot-9 forward from Milwaukee, finished second in the Pac-12 in rebounds and was named second-team all-conference while helping lead UCLA to a 22-14 record and an NCAA Tournament appearance. He averaged 9.7 rebounds a game during the Bruins' three NCAA Tournament games, including a double-double against UAB in the Round of 32.
Looney is UCLA's only likely first-round pick this year after the school had three first-rounders a year ago.
- Alex Putterman