Planck was selected by the Mets in the 11th round from a Kentucky high school in 2016, signing for well above-slot $1 million bonus. The team opted to shut him down that summer to build strength and rest as opposed to pitching in the GCL, meaning Planck began his first full pro season in 2017 on the backfields of Extended Spring Training. He tore the interior capsule in his throwing shoulder just before shipping out to short-season ball, meaning the 2016 draftee waited almost two full years before making his official pro debut in the GCL last summer. Now 21, I caught a look at the righty on my tour through Florida Extended Spring in May of 2019.
Planck has filled out his once-projectable frame, now a well-built 6-foot-4 that looks the part on the mound. It’s clear he has missed key development time, as his simple mechanics (only pitches from the stretch) and pitchability aren’t very advanced. The fastball worked in the 91-to-93 mph range, staying around the plate with consistent armside run. His low-80s slider was short with occasional depth, though the pitch had fairly consistent action. Both offerings are decent–potential 45 or 50-grade pitches–though there’s not enough of a carry tool or arsenal depth for a prospect grade right now. Planck is an intriguing 35+ Follow with some potential to move into the FV 40 range if his stuff ticks up with more pro innings under his belt. Considering the injury history and his age, Planck’s lack of a plus attribute holds him back from that tier for now.