Scouting Report
Updated May 20, 2026
JB Middleton is a 22-year-old RHP prospect for the Colorado Rockies, drafted 45th overall in 2025 from Southern Mississippi. Currently playing for Triple-A Fresno Grizzlies, Middleton was placed on the 7-day IL in early May 2026. Prior to injury, he posted a 4.95 ERA with 1.70 WHIP over 20.0 IP, recording 18 strikeouts, 3 home runs, and 13 walks. He demonstrated strong performance on April 11 with 5 strikeouts and 1 run allowed over 5 innings. Middleton features a three-pitch mix (fastball, slider, changeup) thrown from a three-quarter slot with mid-90s velocity. Despite modest size at 6'0", he shows good command and pitch development focus.
Strengths
- + Strong college performance (2.31 ERA, 122 K in 105.1 IP at Southern Mississippi in 2025)
- + Good three-pitch mix with late-breaking slider that generates whiffs
- + Mid-90s fastball velocity with quick arm action
- + Excellent outing on April 11 (5 K, 1 R in 5 IP)
- + High strikeout rate (18 K in 20 IP)
- + Signed for $2.072M bonus, $100k under slot
- + 45th overall draft pick showing prospect pedigree
- + Focused on pitch development and improvement
Injury Status: IL-10
About
Mitch Jebb is a left fielder for the Pittsburgh Pirates.
Player Overview
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Pittsburgh Pirates