What was the bet that he won?

So Midway through the movie Keanu character bets 12K on a Chicago vs Miami game in order to pay off the barber and Duffy the bartender. He originally says that Chicago never covered the spread since Jordan left so he wants to bet on Miami, then when he makes the bet he makes a last second change and takes Chicago and 6 points...

Was he betting that Chicago would win or lose by 6 points? When they watch the game outside the bar and celebrate it seems Miami won the game by 4 points and Chicago lost. So was he betting on the losing team to lose by 6 points or less?

Always wondered what exactly his bet was.