villain is a loosish looking semi-unknown.

do anything different up until now?

I'm obviously behind usually on the river, am I good often enough to call getting 4:1?

No-Limit Hold'em, $1.00 BB (5 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

Hero (UTG) ($178.90)
MP ($103)
Button ($148)
SB ($100.50)
BB ($146.50)

Preflop: Hero is UTG with K, 9
Hero bets $3, 3 folds, BB calls $2

Flop: ($6.50) 7, 9, 4 (2 players)
BB bets $3, Hero raises $9, BB calls $6

Turn: ($24.50) 10 (2 players)
BB bets $10, Hero calls $10

River: ($44.50) A (2 players)
BB bets $15, Hero?