MLB Player Comparison

Pre-built side-by-side breakdowns of the player matchups baseball fans actually argue about — 17354 head-to-head MLB player comparisons with counting stats, rate stats, PIV (Player Impact Value), peak seasons, and a verdict for each pairing. Grouped below by the kind of argument each one settles.

Looking for a pairing that isn't here? Every player has a full career page — browse all players or try the era translator to line up players from different decades.

Marquee Matchups 1,002 matchups

Roger Clemens vs Cy Young Roger Clemens vs Walter Johnson Roger Clemens vs Randy Johnson Greg Maddux vs Pedro Martinez Curt Schilling vs Cy Young Randy Johnson vs Nolan Ryan Roger Clemens vs Christy Mathewson Roger Clemens vs Lefty Grove Roger Clemens vs Gaylord Perry Kevin Brown vs Cy Young Walter Johnson vs Curt Schilling Pete Alexander vs Roger Clemens Roger Clemens vs Bob Gibson Roger Clemens vs Warren Spahn Roger Clemens vs Sandy Koufax Roger Clemens vs Ed Walsh Babe Ruth vs Ted Williams Barry Bonds vs Babe Ruth Clayton Kershaw vs Pedro Martinez Kevin Brown vs Walter Johnson Roger Clemens vs Carl Hubbell Ty Cobb vs Babe Ruth Dwight Gooden vs Cy Young Roger Clemens vs Bob Feller

Hall of Famer vs Hall of Famer 2,045 matchups

Greg Maddux vs Cy Young Randy Johnson vs Cy Young Walter Johnson vs Greg Maddux Randy Johnson vs Greg Maddux Pedro Martinez vs Cy Young Nolan Ryan vs Cy Young Randy Johnson vs Walter Johnson Greg Maddux vs Nolan Ryan Walter Johnson vs Pedro Martinez Randy Johnson vs Pedro Martinez Walter Johnson vs Nolan Ryan John Smoltz vs Cy Young Greg Maddux vs John Smoltz Christy Mathewson vs Cy Young Lefty Grove vs Cy Young Tom Seaver vs Cy Young Gaylord Perry vs Cy Young Satchel Paige vs Cy Young Mike Mussina vs Cy Young Steve Carlton vs Cy Young Pete Alexander vs Cy Young Bert Blyleven vs Cy Young Greg Maddux vs Christy Mathewson Walter Johnson vs John Smoltz

Same-Era Rivals 9,939 matchups

Roger Clemens vs Greg Maddux Walter Johnson vs Cy Young Roger Clemens vs Pedro Martinez Roger Clemens vs Nolan Ryan Roger Clemens vs Curt Schilling Roger Clemens vs John Smoltz Greg Maddux vs Curt Schilling Kevin Brown vs Roger Clemens Roger Clemens vs Tom Seaver Pedro Martinez vs Nolan Ryan Roger Clemens vs Mike Mussina Steve Carlton vs Roger Clemens Bert Blyleven vs Roger Clemens Randy Johnson vs Curt Schilling Kevin Brown vs Greg Maddux Roger Clemens vs Roy Halladay Pedro Martinez vs Curt Schilling Rube Waddell vs Cy Young Roger Clemens vs Don Sutton Nolan Ryan vs Curt Schilling Walter Johnson vs Christy Mathewson Kid Nichols vs Cy Young Kevin Brown vs Randy Johnson Roger Clemens vs Zack Greinke

Longtime Teammates 979 matchups

Roger Clemens vs Mariano Rivera Kevin Brown vs Nolan Ryan Lou Gehrig vs Babe Ruth Wade Boggs vs Roger Clemens Jesse Burkett vs Cy Young Roger Clemens vs Dwight Evans Chipper Jones vs Greg Maddux Roger Clemens vs Jim Rice Randy Johnson vs Alex Rodriguez Ellis Burks vs Roger Clemens Roger Clemens vs Mo Vaughn Greg Maddux vs Fred McGriff Ken Griffey vs Randy Johnson Randy Johnson vs Edgar Martinez Roger Clemens vs Mike Stanton Cupid Childs vs Cy Young Goose Goslin vs Walter Johnson Andre Dawson vs Greg Maddux Jimmie Foxx vs Lefty Grove Rafael Palmeiro vs Nolan Ryan Bob Gibson vs Stan Musial Willie Mays vs Gaylord Perry Greg Maddux vs Ryne Sandberg Derek Lowe vs Pedro Martinez

Today vs the All-Time Greats 3,333 matchups

Roger Clemens vs Clayton Kershaw Clayton Kershaw vs Cy Young Clayton Kershaw vs Greg Maddux Walter Johnson vs Clayton Kershaw Randy Johnson vs Clayton Kershaw Roger Clemens vs Max Scherzer Roger Clemens vs Justin Verlander Roger Clemens vs Chris Sale Max Scherzer vs Cy Young Justin Verlander vs Cy Young Chris Sale vs Cy Young Roger Clemens vs Jacob deGrom Clayton Kershaw vs Nolan Ryan Greg Maddux vs Max Scherzer Greg Maddux vs Justin Verlander Jacob deGrom vs Cy Young Greg Maddux vs Chris Sale Roger Clemens vs Gerrit Cole Walter Johnson vs Max Scherzer Gerrit Cole vs Cy Young Walter Johnson vs Justin Verlander Jacob deGrom vs Greg Maddux Clayton Kershaw vs Curt Schilling Randy Johnson vs Max Scherzer

Baseball Families 56 matchups

Greg Maddux vs Mike Maddux Pedro Martinez vs Ramon Martinez Barry Bonds vs Bobby Bonds Dwight Gooden vs Gary Sheffield Dom DiMaggio vs Joe DiMaggio Ken Griffey Sr. vs Ken Griffey Jr. Carl Yastrzemski vs Mike Yastrzemski Ed Delahanty vs Jim Delahanty Vladimir Guerrero Sr. vs Vladimir Guerrero Jr. Joe DiMaggio vs Vince DiMaggio Bob Johnson vs Roy Johnson Lloyd Waner vs Paul Waner Cecil Fielder vs Prince Fielder Jason Giambi vs Jeremy Giambi Felipe Alou vs Moises Alou Mort Cooper vs Walker Cooper Brian Giles vs Marcus Giles Matty Alou vs Moises Alou Dick Sisler vs George Sisler Frank Torre vs Joe Torre Eduardo Perez vs Tony Perez Buck Ewing vs John Ewing Bob Ewing vs Buck Ewing Harry Coveleski vs Stan Coveleski

How the comparison pages work

Baseball Data Hub has built 17,354 head-to-head pages, each comparing two careers on one screen. They are grouped by the argument each one settles: Marquee Matchups (1,002), Hall of Famer vs Hall of Famer (2,045), Same-Era Rivals (9,939), Longtime Teammates (979), Today vs the All-Time Greats (3,333), and Baseball Families (56).

A comparison of two hitters or two pitchers opens with a scoreline of how many scored categories each player leads, then shows both career stat cards, a side-by-side table with the leader of each row marked, the PIV comparison, the best seasons of each player and a written verdict. Counting totals favor longer careers, so the rate rows (batting average, on-base percentage, slugging and OPS for hitters; ERA, WHIP and strikeout and walk rates for pitchers) matter most when the careers differ in length. PIV, the site's era-adjusted value measure, is the one figure built to compare players from different decades on the same scale.

When one player is a pitcher and the other a hitter, the page keeps them in separate tables rather than grading a pitcher on his batting. Totals for active players update each night with the rest of the site's data.