I think you should reconsider this method for wagering and doing parlays for everything.... after all, parlays were invented like teasers to make the gambler think they have an edge.... key word is think!
I have known a few gamblers who tried betting parlays all the time like you are considering and one of them did get luckier than heck for a period of time and won a ton of money for about 6 to 8 months before the roof caved in on him during baseball season (keep in mind, even the good pitchers lose and they are normally -200+ anyway). The other guys would win about 20% of the time betting parlays, but when they did win, they would win some good amounts because they got really hot for a week... problem is you're going to lose a lot more overall and the one great week is followed by 4 weeks of losers.
Not sure if other cappers have their thoughts, but I know you hit a huge 2-team parlay in Las Vegas and I would be happy and not make this your normal way of wagering as it will get really ugly at times during baseball which is a tough sport to handicap overall IMHO.
Good Luck this season!