25NL, 99 faces weird river bet from unkown

[Bowlboy]

I think my fold is ok here just curious if villain's got a busted straight or OESD often enough to call? Only 2 orbits with villain so nothing notable so far.

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($37.95)
CO ($28.15)
Button ($17.85)
SB ($27.90)
BB ($7.85)
UTG ($22.15)

Preflop: Hero is MP with 9[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $1</font>, <font color="#666666">1 fold</font>, Button calls $1, <font color="#666666">1 fold</font>, BB calls $0.75.

Flop: ($3.10) T[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets $2.25</font>, Button folds, BB calls $2.25.

Turn: ($7.60) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

River: ($7.60) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $1.75</font>, Hero folds.

Final Pot: $9.35