BRADENTON, Fla. - Tyler Glasnow breezed through the minor leagues in the most dominant way imaginable. He consistently struck out about a third of the batters he faced, put up ERAs below 3.00 and sometimes below 2.00, and was just unhittable.

Then, Glasnow arrived in the majors, and didn't see the same success. He made his debut in 2016, putting up a 4.24 ERA in 23.1 innings. Walks were an issue throughout his career, and they became a bigger issue in his big league debut, with a 12.4% walk rate. He also didn't have a changeup, making him a two-pitch guy, which was an issue when one of those pitches didn't have good control.

The Pirates decided to go with Glasnow in the rotation to start the 2017 season. It didn't look like a good call at the time. Glasnow had added a new changeup wh...

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