He is not working on new pitches? He still throws the fastball, slider, curve, change mix he had last year. I've seen him pitch. What I see is really big uncontrolled mechanics that lead to his walk issues. The key for him will be to find a way to make his mechanics more repeatable so that he can find the control he needs. He just doesn't throw enough strikes. Otherwise, he will continue to walk at least 3 guys per start.
And, unfortunately, the numbers do not lie. He has carried a BB% over 10% since he was in JUCO at Crowder. 19% this year. Those are numbers in the minors! Big league hitters with good eyes will just lay off his stuff and let Misio walk them.
There is no doubt the floor is an electric reliever, but he still needs to find his control in order to achieve it. And there is absolutely no need to rush. He is only 22 and will not be Rule 5 eligible until the end of the 2025 season
His velo has been somewhat down this year to begin with. And velo is not the only thing that matters. Thyago Vieira averages 98mph on his fastball and you can see how that has gone. Uribe averages 99 but his lack of control makes him unsuitable for a closer role for now.
Fear is not keeping him down. Its logic. Everyone in the farm system knows he will not do well. Why destroy the kids confidence like that? And it is also a decision of roster construction and money. You put Misio on the 40-man and he performs badly so you have to option him. Now your 40-man is effectively a 39-man. You also waste an option year, and those are key with pitchers as they adapt to the bigs and bullpen flexibility is needed. And you start the service time clock early, which means you end up losing control over Misiorowski's best years.
"He has more now than 80% of all MLB pitching. " What do you mean by this?