The players union has negotiated that the schedule can be no longer than 183 days, can include no more than two day-night doubleheaders for any team and cannot have any team play more than 20 consecutive days without a day off. Teams traveling from Pacific to Eastern time zones must have a day off in between, among other specifications. The list goes on and on.
There. That should put an end to Alyssa's backseat driving.