The best baseball teams lose at least sixty games a year and the worst teams win close to that same number.

The rest of the league falls somewhere in between. Consider that the more favorites you bet, the higher the percentage of wins you'll need to break even.

For example, if your average bet is a –150 favorite you’ll need to hit 60% winners just to break even. At –170, that number increases to 63% and so on.

Now consider the opposite. If your average bet is a +120 underdog, your break-even percentage drops to approximately 45.5%. At +140, its down to just over 42% and the higher you go the lower the breakeven percentage.