PS $160 WPT Double Shootout - 3 handed A9

[augie00]

I'm the big stack with about 4600, 2nd in chips has about 4000, and short stack has about 2000. We've all done our fair share of bullying, but short stack is the only one who's shown down some mediocre hands.

Blinds 100/200

I have A9o in the SB. Button folds, I raise to 600. BB calls.

Flop 459, two diamonds. Pot is 1200, I bet 800. BB thinks for a minute and raises all in. I have him covered by 600. I call. Comments?

Note: This is only the first table.