I guess Michael Jordan’s source of motivation would be the intrinsic.
Clearly he played for the love of the game. Every failures in life he would take it as a lesson and learnt from it rather than erasing it off his mind. I believe too in life we should have a balance of bad and good things so we can look up ahead to a bright future.
Doing what you love in life is as important as living it. As for Jordan, he loves what he was doing and accepts any hiccups that happened along his career and that is the reason why his name is in the basketball hall of fame. Failure has never been a reason for him to pursue his challenging career. His perseverance made him pull it through to be where he is till now.