So that explains it.

We all wondered why LeBron James looked so out of sorts during Sunday's Game 3 loss to the Celtics in the Eastern Conference Finals. Frankly, I still thought he looked less than 100 percent on Tuesday when the Wine and Gold rallied to top Boston.

James' teammate Richard Jefferson revealed what was happening with the King during his Fox Sports Ohio postgame segment "Was It Something I Said" with Fred McLeod.

"I know he won’t talk about it, so I’ll give my big guy a shout. Deron Williams missed shoot around this morning because he had like a little bug, really lethargic, had no energy. And I think that’s what ‘Bron had. And sometimes these little bugs can go around. And [James] was like, dude when Deron didn’t show up to shoot around, it kind of started clicking in his head. Because for him it was like, 'I don’t know why I was so lethargic, why I had no energy, I had nothing.' And so, these little things happen. [There] was no panic. Look, he was lethargic, they hit a bunch of tough shots, if Marcus Smart doesn’t go 7-for-10 from three, then we’re not even talking about it."

LeBron was held to just 11 points with 6 rebounds and 6 turnovers during Sunday's 111-108 setback to the Celtics. After being tagged with four fouls in the first half of Game 4, James dominated the fourth quarter, scoring 15 of his 34 points in helping the Wine and Gold take a 3-1 series lead.

Game 5 is set for Thursday night at the TD Garden in Boston. The Cavs can advance to the NBA Finals and a date with the Golden State Warriors for the third year in a row with a victory.