Take the way he celebrated — if that's the word — his 32nd birthday this week.
"Do anything fun?" he was asked the next day after practice.
"No, just worked [here]," he said.
"OK, how 'bout after you got home? Do anything fun with the family?"
"No," he said. "We just hung out at the house."
Wow. Way to cut loose, Q.
Sure, in his third season with the Ravens, he's heard the knocks, too — he's not a No. 1 wide receiver, he's too slow, he's too old and so on.
To hear the critics, you'd think the guy would lose in the 40-yard dash to Cee Lo Green. Or that he's ready to check into Oak Crest retirement community at any moment.
Then he goes out and puts up a game like he had in the Ravens' 23-16 win over the Cleveland Browns last week — nine catches for 131 yards, including eight receptions for 125 yards in the second half.
And suddenly the critics look at the highlight reel and stop yapping — at least for a while.
"He stepped up big time," Ravens quarterback Joe Flacco said of Boldin's big night. "He played physically and went up and got some tough, contested catches and really used his body. He was huge for us in that game."
That's the thing about Boldin. His coaches and teammates can't stop heaping praise on him. It's as if he has his own PR firm in the locker room and the Castle offices.
The Ravens talk about his leadership, his smarts, his toughness. They talk about the precise routes he runs. They talk about the clutch catches he makes with those big, strong hands.
They talk about the way he huddles on the sideline during games with fellow wideouts Torrey Smith and Jacoby Jones, explaining how to exploit a defense, drawing it up on his hand the way he used to do as a kid back in Pahokee, Fla.
And when you point out that Boldin sometimes seems overlooked or underappreciated by fans and the media, the other Ravens seem mystified.
"I know the opponents don't overlook him," Ravens coach John Harbaugh said. "He's a star, no doubt."
On the other hand, in keeping with his persona, Boldin is not exactly broken up to hear that he's below the radar of some outside the game.
"I don't care," he said. "I mean, for me, it's more than about getting credit or getting praise. I'm here for one reason, and that's to win a championship. And for me, it's whatever it takes.