Jayson Tatum is finding out the hard way that the good times don't last forever. A disappointing season from the Boston Celtics reached a new low after losing to the New York Knicks on a long triple from RJ Barrett. Celtics coach Ime Udoka called out his team's lack of mental toughness after the loss.

For Tatum, being a part of a losing team is new territory. The Celtics are 18-21, good for 11th place in the Eastern Conference. Ever since Tatum was a rookie, Boston was a strong team that went on deep playoff runs. Now, with the possibility of not even making the postseason becoming more and more likely, Tatum said that he looks back on those playoff runs and admits to thinking that those levels of success would be the norm.

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Tatum channeling his inner Andy Bernard, wishing that there was a way to know you're in the good old days before you've left them, shows just how far Boston has fallen in just a few years. They no longer have the most impressive collection of draft capital in the league and are taking a losing record into January despite looking to be a playoff squad.

Boston has a litany of issues to work out. Udoka has struggled to make the most of his talent and Boston lacks the necessary shot makers to be a high-quality offense. Tatum and Jaylen Brown are enjoying strong seasons once again but it isn't nearly enough.

As the trade deadline approaches, Celtics president of basketball operations Brad Stevens admitted that he is open to making changes. He will have to do so in order for Boston to salvage its season.