In March 2016, I saw Justin Verlander pitch in person and, the next day, tweeted the following.

Saw @JustinVerlander pitch yesterday. Fastball. Dealing with easy velo. This is just... Need words... HE'S BACK! pic.twitter.com/Dhr00pPy3b

— Chris O'Leary (@thepainguy) March 16, 2016

Why did I believe — correctly, as it turned out — that Justin Verlander had finally fixed whatever it was that got him off track?

Justin Verlander

What did I see?

Justin Verlander

I saw a pitcher who had gotten back to moving in a classic manner.

Justin Verlander

A pitcher who did NOT employ the tricks and shortcuts that modern pitchers employ, and that are driving the epidemic.

Justin Verlander

A change that, unfortunately, was to be only short-lived...

• Justin Verlander: What Happened

...and explained why Verlander ended up needing Tommy John surgery.

Pictures of Justin Verlander

The key to Justin Verlander's durability was his pitching mechanics and motion.

In particular, his Timing.

How, at the moment his front foot plants and his shoulders start rotating, his pitching arm was UP and not FLAT.

Justin Verlander on August 31, 2016

These pictures illustrate Justin Verlander's consistently superior pitching mechanics and his perfect Timing.

Justin Verlander on July 19, 2017

Justin Verlander on September 5, 2016

Justin Verlander on August 25, 2017

Justin Verlander's Velocity

How does Justin Verlander create velocity? How did he do it in a way that let him stay healthy?

Justin Verlander on August 31, 2016

That's a question I've been pondering for the past three years and that has a long answer, one I am turning into a webbook called JVelo.

JVelo encapsulates 18 months of following Justin Verlander around the country, accumulating the thousands of pictures and video clips that I needed to be able to understand how Justin Verlander creates velocity.

Justin Verlander on August 25, 2017

And how to teach it to pitchers.