Jonathon Long

The Seam

One Degree — In early May, in the worst two weeks his swing had all year, Jonathon Long told FanGraphs he wanted to stop hitting 106-mph grounders to shortstop. Six weeks later his ground balls fell ten points and his line drives went from a fifth of his contact to a third — while the top of his range, the part feverbaseball's engine measures, did not move at all. August 10, 2026

The card rack

FlagshipJonathon Long #B25-JLO · 2025 Bowman's Best Autograph · 137 recent sales 7N ▲0%

$4.89Raw$17.23PSA 9$36.00PSA 10$47.00BGS 10PSA 10 · 46 nights

Live on eBay now · asking, not sold · as of 2026-08-27 · paid links

$5.99Ungraded$7.95Ungraded$7.99Ungraded

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The rookieJonathon Long #CPA-JLG · 2025 Bowman Chrome Prospect Autograph · 101 recent sales 7N ▲0%

$14.50Raw$55.00PSA 9$124PSA 10$162BGS 10PSA 10 · 46 nights

Live on eBay now · asking, not sold · as of 2026-08-27 · paid links

$20.00Ungraded$20.00Ungraded$24.99Ungraded

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Paid link — as an eBay Partner, FVR earns from qualifying purchases. · Flagship = his most-traded card (the market’s reference); the rookie = the top card of his first card year. As of August 27, 2026 · trend is FVR's own nightly archive · prices via SportsCardsPro · what these terms mean

Scout’s note

A 9th-round pick out of Orange, California in 2023, Long has played 110 Triple-A games this year, hitting .286 with 12 homers and 66 RBI. The engine tracks him but doesn't flag him: his EV95 of 107.93 sits in the 86th percentile of the 439 qualified Triple-A bats we measure, above the 105.0 median. No luck gap prints because that metric needs major-league results and Long hasn't logged any this season. He's hitting the ball hard; what that means against big-league arms is the open question.

Current signals

The read: Long is tracked, not flagged: an EV95 of 108.0 (87th percentile of the 453 qualified Triple-A bats we track; median 105.0). The engine prints no luck gap for him: that number is measured off major-league results and he has none this season, so there is nothing here to call fair or mispriced.

EV95 (mph)

108.005

xVal (MLB grid)

0.3788

Balls in play

334

Age

24

Collect Jonathon Long

If the signal is right, the cardboard usually finds out later. Current listings:

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Not financial advice. We take positions only after publication — never before. Misses stay on the record.