Matthew Prior
RHP / 1B, 3B · Class of 2028 · St. Augustine (CA) · San Diego · 6'4" 184 · R/R · 16y 5mo — among the youngest arms on our shelf · San Diego Show · UNCOMMITTED · PG grade 9 · PG #279 (up from #460 in July) · PBR CA (ranks login-gated at pull)
UVA Recruiting
Pitching Report
PBR Future Games (Class of 2028) · Emerson, GA · July 22, 2026 · TrackMan + in-game tournament velos
🔗 Links: PBR profile · PG profile
92.0
FB Max ('26)
88.8–90.8
FB Sitting (FG)
85.3
SL Max
6.93
60-yd (FG)
16.4
Age (yrs)
Benchmarks — vs. typical 2028 showcase arm
Gray band = typical class range (approx.) · marker = Prior · Future Games TrackMan (velo/spin; movement login-gated at pull)
FB Velo Max
92.0
FB Velo Sitting
88.8–90.8
FB Spin Max
2155
SL Velo Max
85.3
SL Spin Max
2099
Sat 88.8–90.8 touching 91.5 at LakePoint — at SIXTEEN AND FIVE MONTHS. The slider velo is the outlier column: 81.2–84.7 T85.3 is major-college slider velocity right now, just 6 mph off the heater. Low-ish spin suggests a power-sink lean; movement data pending PBR re-login.
Perfect Game + the age math
PG grade 9 · #279 national (9/2, up 181 spots from July) · 16 events · +29 mph since 2020 · 16y 5mo — a full year-plus younger than much of the class
MetricValueNote
FB '26 (PBR velos)90.0 avg · 92.0 maxat 16y5m
CH '26 avg85.5firm, near-SL velo
60-yd / 10-yd (FG)6.93 / 1.58plus runner at 6'4"
PG last public gun87 (6/13/25)pre-jump — stale
PG's scout note (Underclass All-American Games): "tall and slender, very projectable physically… clean arm stroke and release, good mechanics." Their public data hasn't caught his 2026 — the last public gun reading (87) is five mph behind the current PBR logs, and the #460 → #279 jump says their internal looks are catching up fast. DK game logs now in — and they're honest: 20.1 IP, 9.64 ERA, 20 K / 20 BB, .379 against across 12 games. Read with context: like O'Byrne's, these are largely younger-vintage innings logged BEFORE the velo arrived (PG's public gun still says 87) — pre-jump data from a kid who just turned the corner. Current-year St. Augustine logs are the real verification ask.
Development — Feb '26 → Jul '26
CA High School Heat Sheet vs. Future Games looks
LookDateFBSecondary
CA HS Heat Sheet2/24/2686–8977 CB
Future Games (TrackMan)7/22/2688.8–90.8 T91.5SL 81.2–84.7 T85.3
FG tournament (in-game)7/22/2688–92SL 80–85 · CH 85–86
+3 on the sitting band in five months, and the whole secondary set firmed up — the slider went from a 77 mph winter breaker to an 80–85 power pitch, with the changeup thrown at 85–86 off the same arm speed. The three pitches now live within an 8-mph window — a power-pitcher's ladder, at an age when most of the class is a year older.
The Case
Why a movement-data-incomplete report still ranks him
Take Howard's age math and add three inches of velocity: Prior is 16 years, 5 months — younger than every arm on our shelf except Howard — and he's ALREADY sitting 89–91 with an 85 slider. On the standard +3/year development curve, this is a mid-90s arm by junior spring with premium athleticism (6.93 runner) and a 6'4" frame at 184 that hasn't filled a single sleeve. PG grading him a 9 while their own public velo data is five mph stale tells you the rise is happening faster than the boards can print. West Coast kid — San Diego Show plays a national schedule, so the exposure (and competition for him) is coming. The missing piece is movement/extension data (PBR re-login). The PG game logs (now pulled) are rough but pre-date the velo jump — the eval rides on the current arm, not the 14u innings.
Sources: Prep Baseball Report profile (verified 7/22/26; movement & rankings login-gated at pull) — Future Games TrackMan (7/22/26), FG tournament velos, CA HS Heat Sheet (2/24/26), 2026 Pitching Velos · Perfect Game profile (public view; session signed out) — PG grade 9, Underclass All-American Games report, +29 mph since 2020 · Ranks: PG #279 (9/2) vs #460 (July) · Class benchmark bands are staff approximations · Prepared by UVA Pitching · 9/10/26