The Comp Constellation

Profile-shape similarity over six weighted feature groups, standardized within this season's 256 qualified hitters (340+ PA). Closer to the center star = more alike. xwOBA is deliberately excluded: this maps how hitters are built, not results twins.

strong match (0.55+) moderate (0.45 to 0.55) weaker (< 0.45) star size + line weight scale with similarity · rings mark 0.70 / 0.50 / 0.30 · hover a star for why, click for the fingerprint
Radial fingerprint · population percentiles

Two profile shapes drawn over the same axes: overlap is what makes them comps, gaps are where they part. Johnston, Troy in signal, the comp in amber.

COL · bats L · 466 PA

Ranked comps for Johnston, Troy

#PlayerSimilarityAgrees onDiffers onOpen
01 Larnach, Trevor MIN · L · 449 PA 0.64 xwOBA on contactFly-ball rateIn-zone contact Barrel rate +1.7zChase rate -1.1zSwing length +1.1z Player Projection Swing lab
02 Marsh, Brandon PHI · L · 593 PA 0.63 Pull rateWhiff rateSweet-spot rate Barrel rate +1.7zSprint speed +1.4zSwing length +1.2z Player Projection Swing lab
03 O'Hearn, Ryan PIT · L · 472 PA 0.62 Max exit velocityAvg exit velocityBat speed Sweet-spot rate -1.9zBarrel rate +1.5zSwing length +1.2z Player Projection Swing lab
04 Caratini, Victor MIN · L · 400 PA 0.60 Hard-hit rateAvg exit velocityBat speed Chase rate -1.7zSweet-spot rate -1.4zSprint speed -1.4z Player Projection Swing lab
05 Freeman, Freddie LAD · L · 707 PA 0.60 Bat speedSwing lengthAvg exit velocity Barrel rate +1.9zChase rate -1.1zxwOBA on contact +1.1z Player Projection Swing lab
06 Cortes, Carlos ATH · L · 392 PA 0.60 Bat speedSprint speedWalk rate Sweet-spot rate -1.8zChase rate -1.3zOppo rate +1.2z Player Projection Swing lab
07 Rocchio, Brayan CLE · L · 632 PA 0.58 Ground-ball rateOppo rateIsolated power Sweet-spot rate -1.9zSwing length +1.3zAvg exit velocity -1.2z Player Projection Swing lab
08 Jung, Josh TEX · R · 457 PA 0.58 Fly-ball rateBat speedSweet-spot rate Barrel rate +1.5zHard-hit rate +1.4zChase rate -1.1z Player Projection Swing lab
09 Bailey, Patrick CLE · L · 380 PA 0.56 Walk ratePull rateIsolated power Sweet-spot rate -1.7zBarrel rate +1.5zSwing length +1.3z Player Projection Swing lab
10 Grissom, Vaughn LAA · R · 474 PA 0.55 Bat speedStrikeout rateFly-ball rate Sweet-spot rate -2.3zBarrel rate +1.4zSwing length +1.3z Player Projection Swing lab
11 Karros, Kyle COL · R · 496 PA 0.54 Whiff rateFly-ball rateAvg exit velocity Chase rate -1.9zBarrel rate +1.5zMax exit velocity +1.3z Player Projection Swing lab
12 Realmuto, J.T. PHI · R · 492 PA 0.52 Avg exit velocityWalk rateIsolated power Sweet-spot rate -1.9zSwing length +1.8zSprint speed +1.4z Player Projection Swing lab

Weighted RMS z-distance over 6 feature groups, standardized within the qualified population; similarity = exp(-alpha * d^2), one global fixed transform. xwOBA excluded by design: this matches profile shape, not outcome twins. Descriptive, not predictive.