Derek Diamond

B/T R/R · 6' 2" · 210 lb · born Ramona, CA, USA · age 25 · draft 2022 rd 6

PRE-CONSENSUSAAA Pre-Consensus (arm)

Scout’s note

A sixth-round pick from Ramona, California — and yes, a pitcher named Diamond — he opened 2026 with ten scoreless innings at Altoona before the Indianapolis promotion. The stuff grade closes out our arms board; the name alone belongs on a card.

The Wire

△ On the field: Fans noted Diamond's win for the Indianapolis Indians and expressed interest in a potential major-league call-up.

X chatter, trailing 7 days · as of 2026-07-12 · newest post 2026-07-11 · summarized by Grok (xAI) · how this works →

The line

Last 14 days: 4 G · 6.0 IP · 3.00 ERA · 1 SO · 1.17 WHIP

Year	Team	Lvl	G	IP	W–L	SV	ERA	SO	WHIP
2023	Bradenton Marauders	A	15	74.2	8–3	0	3.98	63	1.23
2023	Greensboro Grasshoppers	A+	9	45.0	2–2	0	6.00	34	1.44
2024	Greensboro Grasshoppers	A+	23	95.2	5–6	0	4.80	83	1.32
2025	Bradenton Marauders	A	2	2.1	1–0	0	7.71	1	1.71
2025	Greensboro Grasshoppers	A+	2	3.0	1–0	0	0.00	7	0.33
2025	Altoona Curve	AA	9	14.0	1–3	0	14.79	12	2.93
2026	Bradenton Marauders	A	2	4.0	0–0	0	2.25	5	1.00
2026	Altoona Curve	AA	5	10.0	2–0	1	0.00	13	0.20
2026	Indianapolis Indians	AAA	11	14.0	2–0	0	5.14	8	1.64

Bio & season lines: MLB StatsAPI · refreshed nightly · abbreviations →

Current signals

The read: Diamond's stuff grade of 0.63 ranks in the 94th percentile of the 655 AAA arms we track (median 0.06). Stuff is not command — watchlist, not a call — but stuff comes first.

Stuff-lite: 0.6321
Pitches: 230
Age: 25

Collect Derek Diamond

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

Derek Diamond cards on eBay →

High-end listings ($75+) →

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