Rank History
| Year | Team | Position | Team Rank | OFP |
|---|---|---|---|---|
| 2021 | ARI | RHP | 18 | 45 |
Grades Update: Dec 2020
| OFP | Role | FB | CB | SL | CH | Cnt/Cmd |
|---|---|---|---|---|---|---|
| 45 | 40 | 50 | 50 | 55 | 40 | 45/40 |
Dec 2020 Report
Evaluator: Isaiah Burrows
Age: 26 yr
Height: 6-4
Weight: 200 lbs
Hits/Throws: R/R
Acquired: 2016 3rd
RuleV: On 40-Man
Physical Description: Imposing frame and size on the mound. Filled out upper half with broad shoulders and arms. Compact lower half with large, bulky legs. Large height and size overall. Fits the mold of a reliever.
Delivery & Mechanics: Long and extended three-quarter delivery. Seen as a bit unconventional. Right arm drops and fully extends. Slight pause in delivery before each pitch. Good extension and follow through. Incorporates lower half from the windup/stretch.
Fastball: Low-90s offering with late sink and run. Good movement low and away with tight control and spin, forces ground balls. Fastball sits 91-92, has touched 94 occasionally. Velocity continues to trend downward, lacking as an effective strikeout pitch. Gets barreled in the zone. Grade: 50
Curveball: Low-to-mid 70s curveball that has shown signs of progress. Has good depth against righties. Lacks consistent shape compared to his slider. Thrown with conviction, breaks hard out of the zone. Improved command can help this pitch shine. Grade: 50
Slider: Mid-80s slider with solid break out of the zone. Put away pitch in two-strike situations. Has late run and dive to force whiffs. Slider carries late movement, tunnels well with his fastball. Above-average offering with good break and velocity. Grade: 55
Changeup: Low-80s changeup, behind in development. Lacks shape and spin. Sits firm in the zone. Rarely thrown as a fourth pitch. Needs more refinement and consistency. Grade: 40
Control and Command: Struggles with control and command hold back his progress at times. Has trouble locating for strikes, batters sit off-speed. Follows up an impressive strike with three poorly thrown balls. Needs to tighten his mechanics and approach. Control: 45 | Command: 40
Overall: Jon Duplantier's tall and built frame doesn't produce eye-popping stuff, but it's an effective arsenal nonetheless. His fastball's decrease in velocity remains a concern, and his struggles with command halts his development. After a shoulder injury kept him out of 2020, Duplantier has a chance to compete in the Diamondbacks' bullpen for 2021.
OFP: 45
Role: 40 - Spot Starter/Long Relief
Risk: High
