I'm in a $22 SnG - most players at the table. No big stacks. Nothing odd. Blinds 50/100

I get AK - 1st to act
I raise to 400 (4x)
Guy on my left calls

Cust a long story short. Flop is 676.

I raise, he pushes. I call. He is holding 67 suited

I thought, "WTF is he calling 4x with 67suited!?!?!?" - it was not as if he was deep stacked.
And this is a $22 SnG.

Nuts I thought. Then I looked him up on scope. $12,000 in steady profits from what I can tell - he's called dadozer (on Carbon)

Am I missing something?