GregontheRoad

I don't like your flop bet. You basically gave him a free card on a meaningless flop and he's in position to you. You've increased the size of the pot and didn't get any useful info out of it.

His check behind you on the river tells me he didn't have the straight but probably a pair.

AJs vs 2 shoves? AJs (i.e., you) were the first shove of two total. Your play was okay (lots do it w/ 10'ish BBs). But why force it? CO is almost always going to call/raise so you're forcing a flip at best, a way-behind hand at worst.

Out of position like this your cards are sort of irrelevant. You have a weak hand but could get lucky. If you see a flop you're going to be roughly 25% plus/minus.The UTG+1 raise is usually going to include an Ace and/or two broadways. Everything depends on the flop. 3 cards under T and your'e going to be betting like crazy without looking back.