Rank History
| Year | Team | Position | Team Rank | OFP |
|---|---|---|---|---|
| 2021 | ARI | RHP | 24 | 40 |
Grades Update: Dec 2020
| OFP | Role | FB | SL | CH | Cnt/Cmd |
|---|---|---|---|---|---|
| 40 | 40 | 60 | 45 | 40 | 40/30 |
Dec 2020 Report
Evaluator: Isaiah Burrows
Age: 19 yr
Height: 6-3
Weight: 180 lbs
Hits/Throws: R/R
Acquired: 2018 IFA
RuleV: 2022
Physical Description: Slender build with long arms and legs. Small chest and lower half. More room for added muscle, maximize his frame. Very raw, made an emphasis to add more size this season.
Delivery & Mechanics: Sound mechanics for a teenage prospect. Arm action is consistent and repeatable. Quick and shortened three-quarter delivery. Fires the ball to the plate, struggles with command.
Fastball: Explosive high-90s offering with great velocity and spin. Fastball touches 99, but sits in the 94-96 range. Gets good extension, spots it well high in the zone for late swings. More gas than movement at the moment, but still effective. Plus-fastball that remains a standout in his arsenal. Grade: 60
Slider: Mid-80s off-speed pitch that shows signs of improvement. Slider has good break and spin, thrown with force like his fastball. Lacks consistency at times, lies flat in the zone. Has potential to become an effective pitch. Grade: 45
Changeup: Low-80s changeup, looks to be a work in progress. Lacks bite and shape, stays firm. Pairs well with his velocity-packed fastball. Shows signs of a promising third pitch. Grade: 40
Control and Command: A bit of a wild hurler. Struggles with command and control. Doesn't locate well low and away. Has strikeout stuff, but has trouble finding the zone. Command and control can improve with time to grow into his body. May need to tighten his mechanics. Control: 40 | Command: 30
Overall: Armed with a plus fastball and effective slider, Martinez is one of the intriguing young arms in the Diamondbacks' system. Martinez continues to improve and grow with each season, though he needs to refine his command and add a fourth pitch to fulfill his potential.
OFP: 40
Role: 40 - Spot Starter/Long Relief & Low Leverage Relief
Risk: Extreme
