Five Profitable MLB Systems Every Bettor Should Follow This Season It’s Opening Day of the 2018 Major League Baseball season. You’ve been so focused on March Madness you forgot about the boys of summer. With no time to research, you scan the board and realize all 30 teams are in action Thursday. Double dukes, now you’re really up against it. Yankees over Jays, Kershaw against the Giants, Astros-Rangers under, the options have you going cross-eyed.