Boston Celtics forward Jayson Tatum has been one of the most watched rookies this summer since he was selected No. 3 overall.

So far in every opportunity presented, Tatum has excelled. Speculation has turned into a certainty that Tatum is going to be the next big thing in Boston and, while that very well may be true, he hasn't even played a regular season game yet.

That's just the thing. Tatum has been killing it, but he hasn't been killing it against top NBA talent, which is where this little gem came in a recent interview.

​​"I tried to switch on a pick and roll against Kyrie. It wasn't summer league," Tatum said.

It's a hilarious reality check to hear him acknowledge, but it's also a very real one. The jump from college to the NBA is like going from the kiddie pool to diving into the middle of the ocean. 

The transition is such an enormous leap in talent that torching the summer league means the equivalent of nothing.

When it's time to go one-on-one with the likes of Kevin Durant or LeBron James, chances are that nasty crossover or jumper on some guy that ended up in the D-League won't work quite as well.