Run expectancy: how to use it sensibly

A good pitcher does not throw each pitch in isolation. Sequencing, the order and pairing of pitches, is a large part of the craft, and pitch data has begun to describe it. The most discussed concept is tunnelling, in which different pitches look alike for as long as possible.

Pitches that look the same

A fastball and a changeup that leave the hand on the same path give the hitter very little time to tell them apart. The ball then separates only in the last part of its flight. A hitter must commit to a swing before that happens, so he often swings at the wrong one. Tracking data can measure how long two pitches stay together, and it gives a number to something scouts used to describe by feel.

Sequencing builds on this. A pitcher may use a high fastball to set up a low breaking ball, or repeat one pitch to change what the hitter expects. The pattern depends on the count, the hitter and the situation, which is why no single recipe works for everyone.

The Betrolla Casino platform is one example of a presentation where the count, the pitch type and the score appear together, and watching with that information makes a plate appearance feel like a short conversation between pitcher and hitter.

A helpful image is two pitches that look like twins until the last metre. The hitter’s brain must decide at about the halfway point, and the ball has not yet revealed which pitch it is. That narrow window is the whole idea of tunnelling in a sentence.

What to look for

Try following one at-bat and noting how the pitcher varies speed, height and side of the plate. You will often see why the last pitch worked or failed, based on the earlier ones. This is a more reliable lesson than any one outcome. Repeating a pitch is a tool of its own. After two fastballs in the same spot, a third pitch in that spot is what the hitter is waiting for, and the pitcher may switch plans. Counting the patterns over a season gives a measurable view of the craft.

If your viewing includes betting markets, an elegant sequence can look like a certainty. A budget and a time limit decided in advance, and a pause between at-bats, remind you that a single wager can still be lost.

Sequencing data deepens appreciation of the game. It adds insight into the craft without turning any plate appearance into a prediction.

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