The Comp Constellation

Profile-shape similarity over six weighted feature groups, standardized within this season's 259 qualified hitters (288+ 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. Fermín, José in signal, the comp in amber.

STL · bats R · 327 PA

Ranked comps for Fermín, José

#PlayerSimilarityAgrees onDiffers onOpen
01 Loftin, Nick KC · R · 374 PA 0.70 Bat speedAvg exit velocityxwOBA on contact Fly-ball rate +1.2zWhiff rate +1.0zSweet-spot rate +0.8z Player Projection Swing lab
02 Perdomo, Geraldo AZ · L · 594 PA 0.68 Whiff rateAvg exit velocityHard-hit rate Walk rate +2.1zSwing length -1.3zSweet-spot rate +1.0z Player Projection Swing lab
03 Hicks, Liam MIA · L · 506 PA 0.67 xwOBA on contactWhiff rateMax exit velocity Swing length -1.3zSprint speed -1.1zIn-zone contact +1.1z Player Projection Swing lab
04 Schanuel, Nolan LAA · L · 463 PA 0.65 Pull rateBarrel rateIsolated power Sweet-spot rate +1.3zSwing length -1.3zSprint speed -1.1z Player Projection Swing lab
05 Lee, Jung Hoo SF · L · 523 PA 0.63 Whiff rateHard-hit rateSprint speed Chase rate +1.5zPull rate -1.3zOppo rate +1.0z Player Projection Swing lab
06 Rocchio, Brayan CLE · L · 523 PA 0.63 Avg exit velocityMax exit velocityHard-hit rate Chase rate +1.8zWhiff rate +1.6zIn-zone contact -1.1z Player Projection Swing lab
07 Yoshida, Masataka BOS · L · 316 PA 0.62 In-zone contactStrikeout rateMax exit velocity Bat speed +1.6zGround-ball rate +1.6zHard-hit rate +1.1z Player Projection Swing lab
08 Gilbert, Drew SF · L · 359 PA 0.59 Avg exit velocitySwing lengthSprint speed Whiff rate +1.5zSweet-spot rate +1.5zOppo rate +1.1z Player Projection Swing lab
09 Frelick, Sal MIL · L · 353 PA 0.59 Bat speedBarrel rateWalk rate Ground-ball rate +1.8zSweet-spot rate -1.3zSprint speed +1.1z Player Projection Swing lab
10 Durbin, Caleb BOS · R · 524 PA 0.58 Barrel rateWalk rateStrikeout rate Avg exit velocity -1.4zGround-ball rate +1.3zPull rate -1.2z Player Projection Swing lab
11 Marsee, Jakob MIA · L · 535 PA 0.57 Chase rateFly-ball rateIn-zone contact Swing length -1.7zWalk rate +1.6zStrikeout rate +1.4z Player Projection Swing lab
12 Palacios, Richie TB · L · 348 PA 0.57 Isolated powerxwOBA on contactSweet-spot rate Chase rate +1.7zWhiff rate +1.4zIn-zone contact -1.2z 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.