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MLB Deserve-to-Win
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Jonathan Heasley

2026
Rays· RHP · throws R· 4.0 IP· 11.25 ERA· 2.00 WHIP· 19 batters faced

Grade

His grade shows how good he has been, and at what.

Too few batters faced to grade

Jonathan Heasley has faced 19 batters this season. A rate built on that few can swing a long way on a single result, so his rates get no grade and no league percentile yet.

A grade needs 40 batters faced. League medians and percentiles come from pitchers with at least 100 batters faced. The sections below show what actually happened, with no grade attached.

Arsenal

These cards show what he throws and what each pitch does.

Pitch mix & swing-and-miss

Four-Seam Fastball
39%
91.4 mph
—
Slider
not charted
33%
83.2 mph
—
Changeup
not charted
19%
84.2 mph
—
Curveball
not charted
9%
79.9 mph
—

Only his four-seam fastball is in the charts below, because the rest were tracked too rarely to plot.

How to read this chart
Each row is a pitch he throws at least 3% of the time, from pitch tracking in the regular season. The bar is how often he throws it, then its average velocity and its whiff rate, the share of swings that miss. More whiffs are better for a pitcher, while usage and velocity describe how he pitches.

Contact allowed

These cards show what hitters do when they make contact.

Batters go to the pull side off him most often, and that's also where they do the most damage.

Pull side and opposite field depend on which side each batter hits from, so this pools every hitter he faced.

Batted balls allowed

Every ball hit off Jonathan Heasley this season is drawn where it landed.
hit · out
EBlowhigh
vs Gunnar HendersonHome run
110 mph · 25° · worth 3.9 bases
05/27 vs Orioles
vs Blaze AlexanderHome run
109 mph · 28° · worth 3.9 bases
05/27 vs Orioles
vs Blaze AlexanderDouble
100 mph · 12° · worth 2.0 bases
05/27 vs Orioles
vs Adley RutschmanDouble
91 mph · 11° · worth 1.4 bases
05/27 vs Orioles
vs Coby MayoSingle
97 mph · 15° · worth 0.8 bases
05/27 vs Orioles

Luck check

How to read this chart
Dot color is estimated bases (EB), what the contact was worth no matter what the defense did with it. Darker means more bases, so a dark hollow ring in the outfield is a crushed ball his defense ran down. Tap or hover a dot or a row to link the two, and use the ▶ links to watch a play on Baseball Savant.

Times through the order

These charts show what happens as hitters see him a second and third time.

Best games

These are his biggest outings this season.

Best games

These are his best outings this season, ranked by bases saved against a replacement arm.

Multi-season trends · Jonathan Heasley

Compared with his previous season, his HR allowed% is up, his BB% is down and his K% is down.

Actual rates show what happened on the field, season by season.