Scouting Report: Juan Martinez
Chicago Cubs | 3B
Overall
Summary
Justin Martinez, 24-year-old right-handed closer for the Arizona Diamondbacks, underwent Tommy John surgery on his right elbow in June 2025 after exiting a game against Seattle. As of May 2026, he has completed his first bullpen session since surgery at Salt River Fields, throwing with impressive velocity (96-99 mph fastball). Manager Torey Lovullo described the session as "electric." Martinez still requires approximately 15 total bullpen sessions before progressing to a minor-league rehab assignment, with a targeted return to the active roster in late August 2026. Prior to injury, Martinez saved 13 games in 2024-25 with a 2.76 ERA and triple-digit fastball velocity.
Strengths
- Fastball velocity already at 96-99 mph on first bullpen session post-surgery
- Manager describes performance as 'electric'
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