Why Did Matt Niskanen Suddenly Retire From The NHL?

It seemed very sudden as Niskanen, looked very strong with the Flyers and was a major piece in the defence core. Nobody really knew why Niskanen abruptly retired, but fans were finally given somewhat of an answer. Thanks to Ian Laperriere.

Nasty Knuckles Podcast interviewed Ian Laperriere, who addressed why Matt Niskanen retired, as the answer is quite underwhelming.

Matt Niskanen, simply said that he was «Done» after the bubble year.
The Flyers acquired Matt Niskanen, from the Capitals on June 14, 2019. That sent Radko Gudas to Washington in return.

The Washington Capitals may have known that Matt Niskanen, wasn't going to play after next season. Leading the Capitals to give him up in a simple one-for-one deal.

In 68 games with the Philadelphia Flyers, Matt Niskanen racked up 8 goals, 25 assists, for a total of 33 points. As a two-way defence, Niskanen, was a huge asset to the Flyers roster. Matt, helped the younger players around him and was a key piece in his way year of play.

Niskanen, leaving may have been the downfall for the Flyers back end, since his retirement the team hasn't been the same.