Disclosure time: having done the math, I realise I spent 16 hours watching live sport on Sunday. This doesn't reflect a passion for sport, rather it exposes a man with a medical condition! For the record: golf 5hrs, racing 2hrs, rugby 2hrs, football 3hrs, Superbowl 4hrs.

This is what I learnt from 16 hours of watching live sport two days ago. 1. Dustin Johnson isn't just the number one ranked golfer in the world. He is by a considerable margin the game's best player. He hardly holed a putt in his final round in Saudi Arabia and still won easily.

Two hours of watching the racing from Leopardstown was a reminder that Willie Mullins will again be the leading trainer at the Cheltenham Festival. Mullins has trained 72 winners at the Festival. He could get to 80 next month.

As much as I enjoyed the Wales v Ireland game from Cardiff it came with the now customary unease about the number of brain injuries in the game. This fan's joy comes wrapped in guilt. The game has to change. The sooner the better.

Watching Man City's victory over Liverpool, I thought of a conversation I'd had with my Sunday Times colleague Jonny Northcroft two years ago. He thought Phil Foden would be England's pivotal player in 4-5 years. I thought it would be Mason Mount. Right now, he's winning.

Jordan Spieth compelled me to watch the Pheonix Open on Sunday night. After a period in the doldrums, Spieth was back leading a tournament on Sunday. He didn't get the job done but while battling his way to tied 4th, he again showed why he's got more charisma than anyone on Tour.

At the end of a ridiculously long day, the four hours spent watching the Superbowl were well worth it. For this was an opportunity to consider again the Tom Brady phenomenon. The message was unmissable. He is the ultimate winner.