Why is Luis Severino having trouble staying healthy?

Because Severino has a Timing problem.

However, Severino's problem is that, like James Paxton, his arm is EARLY, not LATE.

And, contrary to what Brian Cashman thinks...

It could be small and a timing issue or it could be significant

...it IS a big deal.

Yankees GM Brian Cashman said that the last MRI for Luis Severino was in January. Severino had two MRIs and a CT scan after complaining of discomfort, and all tests have been negative. “It could be small and a timing issue or it could be significant,”... https://t.co/UG6UfiPGYr
— Marly Rivera (@MarlyRiveraESPN) February 20, 2020

Luis Severino's Pitching Mechanics

Remember EARLY can be just as bad as LATE in terms of Timing.

And sometimes WORSE.

The concern is structural shoulder problems (Labrum, etc) not to mention the standard elbow problems.

For Luis Severino as for so many.https://t.co/zxLh9YLwMN pic.twitter.com/G07V3NlMKW
— Chris O'Leary | Baseball (@thepainguy) October 15, 2019

2018 August 3

What did I see in Luis Severino?

How did I know he was riskier than people thought?

While it looks like his pitching arm gets UP on time, here's when his pitching arm comes under load.

It's not FLAT but it's not UP.

And maybe flatter than up.https://t.co/8kRBqDMuNZ pic.twitter.com/XZpcYR8J6D
— Chris O'Leary | Baseball (@thepainguy) August 3, 2018

2017 June 22

The more I see of James Paxton the more I wonder if, like Luis Severino, his arm is EARLY. Which can be as bad as, or even worse than, late. pic.twitter.com/87Ol3ro5c9
— Chris O'Leary | Baseball (@thepainguy) June 22, 2017

2015 August 17

I'm concerned a/b Luis Severino b/c he is early. Arm up but foot isn't down. Creates weak link/breaks kinetic chain. pic.twitter.com/9pS24aEWr3
— Chris O'Leary | Baseball (@thepainguy) August 17, 2015

2015 August 6

Going thru this frame by frame, Severino is early. Arm goes up then stalls. Similar to Wacha. Freddie Garcia? http://t.co/ZoYDr8nhUA
— Chris O'Leary | Baseball (@thepainguy) August 6, 2015