(CNN) - Secretary of State John Kerry slammed Los Angeles Clippers owner Donald Sterling in address to graduates at Yale University on Sunday.
"You are graduating today as the most diverse class in Yale's long history," he said. "Or as they call it in the NBA, Donald Sterling's worst nightmare."
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Kerry made his remarks as the featured speaker at Yale's Class Day exercises during commencement weekend.
His joke comes after Sterling repeatedly denied he is a racist in an exclusive interview with CNN's "AC 360" last week, despite remarks made in a private conversation with his friend V. Stiviano that were released online.