Why in the name of mercy would you pick a team that's NEVER WON against the opposing pitcher to finish a parlay? The Giants line-up against lefties is much weaker than their line-up against right handed pitchers. Look at Panda's splits, for starters.
I'd give my left nut for the Giants to win tonight. I couldn't stomach going to the game with so much on the line. But the numbers don't add up and it appears to me that you were chasing rather than handicapping.