you also need to know what type of player the SB is and his stack size relative to the other players. If he's bigger stack he is probably more likely to be bullying you off marginal hands. He could have had hands like K9 or JT in his range too, so the more you know about that player, the better a decision you can make. if the blinds to your left are tight then folding there and trying to steal the blinds with position is probably the safest play.