99 unimproved - good play or bad play?

[Akimka]

Party Poker 1/2 Hold'em (9 handed)

Preflop: Hero is MP2 with 9/images/graemlins/club.gif, 9/images/graemlins/diamond.gif.
UTG folds, UTG+1 folds, MP1 folds, <font color="CC3333">Hero raises</font>, MP3 folds, CO folds, Button calls, SB calls, BB calls.

Flop: (8 SB) K/images/graemlins/diamond.gif, 2/images/graemlins/heart.gif, 2/images/graemlins/spade.gif <font color="blue">(4 players)</font>
SB checks, <font color="CC3333">BB bets</font>, <font color="CC3333">Hero raises</font>, Button folds, SB calls, BB calls.

Turn: (7 BB) 3/images/graemlins/diamond.gif <font color="blue">(3 players)</font>
SB checks, BB checks, <font color="CC3333">Hero bets</font>, SB calls, BB folds.

River: (9 BB) J/images/graemlins/club.gif <font color="blue">(2 players)</font>
SB checks, <font color="CC3333">Hero bets</font>, <font color="CC3333">SB raises</font>, Hero folds.

Final Pot: 12 BB

[davelin]

I'd be tempted to just check the river. Better hands aren't folding and worse hands aren't calling.