Thinnish (or is it?) river shove

UTG ($81.06)
Hero (Button) ($147.30)
SB ($127.55)
BB ($130.15)

Preflop: Hero is Button with 9, K
UTG calls $0.50, Hero bets $2, 2 folds, UTG calls $1.50

Flop: ($5.15) J, A, 10 (2 players)
UTG checks, Hero bets $2.50, UTG calls $2.50

Turn: ($10.15) K (2 players)
UTG checks, Hero checks

River: ($10.15) 4 (2 players)
UTG checks, Hero bets $9, UTG raises to $25.50, Hero raises to $142.70 (All-In)

Does anyone think it's too thin to jam the river? I figure after he flats the flop and checks the turn, he can never really have AdXd here. I also think, although it doesn't matter really, that he's not calling with worse than QdXd, but (thankfully) he was bad enough to check that on the turn.

Any thoughts?