The late John Havlicek (he died in 2019) was part of two great eras with the Boston Celtics, first with the Bill Russell dynasty and then after Red Auerbach rebuilt the team around him and Dave Cowens in the early ‘70s.
He retired in 1978 at 38 but later said if he had known Larry Bird was coming he would have played a few more years.
He was famous for being inexhaustible and for being able to run all day. The guy never got tired.
The 6-5 Havlicek took over the sixth man role for the Celtics after Frank Ramsey retired and became even better at it.