Greg, its easy....
Play every road team -1.5 runs, but you fade the worst teams. The first game of the series, you risk 1 unit. If they lose, you play the second game for 2 units. If it loses again, play the third game for 4 units. If the game wins at any time, you stop the series thus giving you a profit on the series.
Ex: Tonight you played the Mets AT Braves for 1 unit -1.5 runs. Mets win, and you dont play any more games in that series. You net 1.4 units or so. You also played the Twins AT Detroit for 1 unit. Twins lose. No problem, you play them again tomorrow for 2 units. If they win, you profit 1 unit.
Last year this system won well over 200 units. Play it at your own risk, please tread carefully especially at the beginning.