Mariners' Luis Castillo's Statcast numbers make his problems look long-term

Let's dig into some of those key metrics that Harrigan references.

Castillo gives up some of the hardest contact in the game -- he ranks in the eighth percentile for average exit velocity, giving up contact at an average of 91.7 miles per hour.

His strikeout percentage is below average, and he gives up too much barrel percentage (12.6%) and hard-hit percentage (47.4%).

An intriguing stat that's hard to know exactly what to make of it is this -- Castillo ranks in the 1st-percentile, essentially last, in extension. That's measured in feet, and Castillo's is just 5.5 feet.

That means, in essence, hitters have just a little bit longer to react to his pitches as they're coming toward home plate.

When you consider that Castillo might simply be declining some, and that his metrics back it up, he may not have much longer to last in the Seattle starting rotation.

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