Typically they at least start these things in spring training so everyone can get used to it and hopefully work the kinks out of the system. But, as much as I often feel for the umps, they have been and will continue to be against every bit of technology to evaluate and improve their performance. They fought Questec. They are fighting instant replay. They’ll fight electronic ball/strike calls eventually. That’s fine. If they want to stand in the way of improving the game, they can. But if they don’t go along with these improvements, then they’re out. Any ump that doesn’t want to be a part of an improved system can retire now, or be fired. Umpires not interested in more accuracy in their calls should be looking for a new line of work. I would have no problem with another mass firing of umpires. There are many minor league umps who I’m sure would be willing to work within whatever system MLB set up.