Doble check call turn y river ¿STD?

Grabbed by Holdem Manager

NL Holdem $1(BB) Replayer

Hero ($32.50)

BB ($111)

CO ($231)

BTN ($100)

Dealt to Hero 7:spade: J:spade:

fold, fold, Hero raises to $2.50, BB calls $1.50

FLOP ($5) 7:heart: 4DIAMONd 9:spade:

Hero bets $2.50, BB calls $2.50

TURN ($10) 7:heart: 4DIAMONd 9:spade: 2:club:

Hero checks, BB checks

RIVER ($10) 7:heart: 4DIAMONd 9:spade: 2:club: A:spade:

Hero checks, BB bets $6.20, Hero calls $6.20