You would be forgiven for thinking Boston Celtics talent Jayson Tatum improbably grew two inches before his fourth NBA season.

In recent months, his head coach, Brad Stevens, has, twice, said that Boston's star 22-year old wing had shot up to 6'10.

First, in August, Stevens mentioned that Tatum had added two inches.

“Some of these teams that are ‘small,’ Tatum is 6-10 and (Gordon) Hayward’s a big guard, Jaylen (Brown)'s a big guard,” Celtics coach Stevens said, via MassLive.com. “You kind of go through and they’re not that small versus maybe traditional lineups.”

Then, earlier this month, Stevens once again referred to the All-Star as “6-foot-10”.

Utah Jazz guard Donovan Mitchell, for one, wasn't buying Stevens' claims.

Apparently — and perhaps not surprisingly — Stevens says he was just joshing all along.

“I'm pretty sure I said that in like July in jest, and I was just talking about it in terms of, he's long, he's active,”Celtics coach  Stevens confessed Wednesday on 98.5 The Sports Hub's ‘Zolak & Bertrand'. “And it decided to have legs in early December, which was an interesting media study or social media study of its own, I guess.”

(Stevens is off on his timeline, like his height assessment, as the comments were in August.)

Tatum remains officially listed at 6-foot-8 on the team's official website.

“Tatum came in the next day and he was just laughing,” Stevens said, via NBC Sports. “And I said, ‘The good news is, we can pretty much start anything. I just have to say it. So, we had a good laugh about it.' “

The budding Celtics superstar signed a five-year, $195 million contract extension with the franchise.