Portland Trail Blazers owner Paul Allen was the co-founder of Microsoft. Los Angeles Clippers owner Steve Ballmer is a former Microsoft CEO.
Allen resigned from the Microsoft board of directors in November 2000 (Ballmer took over in January 2000), but remained a senior strategy advisor for the company. He became the owner of the Trail Blazers in 1988.
According to Kevin Ding of Bleacher Report, Allen offered some advice to his former colleague when Ballmer took over an NBA franchise.
Ballmer eventually purchased the Clippers in August 2014 while head coach Doc Rivers had become head of basketball operations just a few months prior in June.
Earlier this afternoon, nearly three years later, Rivers was relieved of his executive duties. Rivers said he had discussed the change with Ballmer for over a year.