Dillon Brooks and Tyler Dorsey will remain in school after testing the NBA Draft waters.
For the second straight season, head coach Dana Altman has landed the junior college national player of the year.
A seven-week strength program began Monday for the Ducks, who enter the offseason motivated by the sting of their Elite Eight defeat.
Oregon basketball had a lot to celebrate from a 2015-16 season that ended a game short of the Final Four, motivation for the returners.
Oregon struggled on the boards in the first half and couldn't contain Oklahoma star Buddy Hield, who led the Sooners to an 80-68 victory.
In the Elite Eight on Saturday (3:09 p.m., CBS), Dana Altman will face the man who gave him his first D-I job, Oklahoma's Lon Kruger.
Oregon contested Duke shots both on the perimeter and at the rim, setting up an Elite Eight matchup Saturday vs. Oklahoma (3 p.m., CBS).
Oregon advanced to an NCAA Tournament regional final for the sixth time by beating defending champion Duke on Thursday, 82-68.
Duke's NCAA Tournament history is without peer, but Oregon enters Thursday's Sweet Sixteen matchup as the West Region's top seed.
Oregon's three-point defense has seen a marked improvement the past three weeks, but Duke will test that Thursday (7:07 p.m., TBS).
In his third NCAA Tournament, a UO record, senior Elgin Cook finally gets to play in a Sweet Sixteen after Sunday's win over Saint Joseph's.
The Oregon men's basketball team beat Saint Joseph's, 69-64, in Spokane Arena Sunday to advance to the Sweet Sixteen of the NCAA Tournament.