Hint: Easy points:
Start a two player game, with only one actual player. Throw a perfect game, striking out every batter. Save the game in the bottom of the ninth inning with two strikes and two outs. Finish the game, collect your points, and save the options. Reload the game and repeat to collect the points again.

Change to the team that you are facing and make them play poorly, allowing your original team to score a lot of runs. In the last inning, switch back to your team and claim your team's cheaply made points.