He is reportedly still undecided on his future.
"I used to be able to jump and touch the top of the white square behind the rim with ease," Collins, 35, told the crowd of nearly 600 Monday night at San Francisco's Castro Theatre for the Commonwealth Club's latest Inforum conversation.
"As the years go by, you watch your hand go lower and lower on that square. Father Time is undefeated against us all. ... I'm really grateful for my Stanford degree now. On the other hand, I can still dunk."
Collins, an advocate for gay rights, could earn more money from endorsements than the $2 million he would likely earn from an NBA team, according to the report.
Collin, 25, averaged 7.8 minutes in 22 games with the Nets last season.
- Chris Johnson