Nick Saban definitely has a losing record as a head coach. He was only with the Dolphins for two years so there would be a max of 32 games. You must be counting the years he was a DC for the Browns. He was not their head coach.
Almost every question is specifically about American sport. Be better if you could include more diverse range of sport so everyone outside the US can play too. Or just add a description to say US sports instead of just Sports so users can decide whether they want to play or not.