Here is what he said:
"I've known for a little while. It's the right time," Watt said in his first time speaking with reporters since announcing he was hanging it up. "It feels like the right time. I've put so much into the game and the wins and the losses, the mental stress and passion that comes with it, it just weighs on you. It's heavy, I mean it's really heavy.
"The losses are very tough to take. You live with the highs and the lows, and I've always said that I'd way rather live with the highs and the lows than never know in the middle. I've got a son now. Obviously, I had a heart scare in the middle of the year, so there's certainly some of that that played into it. But I'm very happy and am very at peace with it."
https://www.youtube.com/watch?time_continue=1&v=ZsbhQHQxLLY&feature=emb_logo