[otctrader]

Tough one; his preflop call is likely either some broadway combo or low-mid pair. Flop action unfortunately doesn't tell me much - it looks like a WA/WB situation, but since he checked the river, I'd be shocked if he checked a set and/or broadway straight to you, so I'd rule those hands out.

Given that, I'd guess he's putting you on a whiffed AK and calling the flop with some broadway Jx, maybe mid-pair. If I were in his shoes, I'd call that into question after you check the drawish turn, and be tempted to pick off a bluff here because I'm not sure what you're trying to represent with the river push.

Being that you checked the turn (which is fine), I think you have to check behind here since I'm not sure you'd ever fold out anything that beats you except for a very weak-tight jack.