maybe this will help some of you guys understand it better.till you have played 140 which you do in minors or more or 160+ in the show in 5.5 months + practice you have no idea what type of wear and tear your body goes through,add travle and stuff coast to coast it really wears on you more then any other sport,you play at least 5 out of 7 days every week for almost 26 weeks and 1.5 months of spring training if you are a catcher or pitcher,if you played some college ball it is not even close to the same as that many games,and it wouldnot show up yesterday maybe a hit or 2 but its the next week or more because when you throw over 90 pitches your tendons and legiments are torn slightly and stretched and muscles are dead with latic acid build up and if you keep doing that till you are ready which he isnot you will have a mass of scar tissue the size of a ping pong ball before the end of the year or tendonities in either the elbow or the shoulder,also you run a greater risk of tearing a groin muscle or hamstring pull.
trust me the coaching staff has a chart for everything they know when you hit the wall,doesnot matter if he is still hitting 90,you look at location,movement,and sharpness on pitches they know before he knows when it is coming its a science,his time to the plate had dropped .12 secs from the 6th to the 7th that shows you he is tiered has nothing to do with speed you can still get that ,its the other things i just talked about that give it away.
each pitch is timed for speed with a gun,speed to the plate with a stop watch and video tape of each pitch and mechanics,people are paid to watch all this during the game not just coaching staff,whatch the guy in the hat behind homeplate in a dodgers game he has been with them for 15+years,he isnot a coach but he has all the pitching info that is his job. trust me they know how many times you piss in a game to know if you are getting enough fluids or if you are not putting out enough and have the chance of heat stroke or cramps and that isnot bs,way more goes on then you think,inless you have been there you wouldnot know,alot more goes on then just throw and hit the ball and run,way more. somedays you play 13 games in 14 days it is hell on the body,go golf every day foe 6 stright months and carry your bag and jog to ball after each shot,then you will get almost 1/4 of what it feels like to play baseball that many games in that time frame, and cox is by far not a stupid manager,and has the best pitching coach and traing staff in baseball,all of these people have input on this,then cox has the last word.