On the screen just before you start the actual game on the field you have an option on the left to disable the warming up rule. Some people use that option since the opponent team AI doesn't use the warm up rule. By disabling it you just assume that your pitching coach has your back and your pitchers ready.
Thank you for your service EE. I'm happy with what our new FO have accomplished so far. We saved a bundle, gained a first round draft and hopefully another one with JB. Our birds will be in for another playoff run AND a bright future.