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Rony Calderon

BOS · Complex · Age 18 · 11.2 IP
LHP Complex BOS
3.86
ERA
Rony Calderon is a 18-year-old LHP in the BOS organization, currently at the Complex level. Across 11.2 innings, Rony has posted a 3.86 ERA with a 7.21 xFIP and 1.80 WHIP. The strikeout rate sits at 22.4% against a 22.4% walk rate, a 0.0% K-BB% and 15.2% swinging-strike rate.
On the Statcast side, the fastball averages 87.6 mph (topping at 93.1) with +12.1" of induced vertical break and a -5.72° vertical approach angle.
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Core Metrics
ERA
3.86
xFIP
7.21
K%
22.4
BB%
22.4
Command & Stuff
WHIP
1.80
K-BB%
0.0
SwStr%
15.2
IP
11.2
Statcast Fastball Profile
Velo
87.6
Max
93.1
IVB
+12.1"
VAA
-5.72°
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Data via ProspectTilt PitchIQ — live MiLB Statcast analytics.
Stats current as of June 17, 2026. Updated nightly.
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