MLB Era Translator

Take any all-time-great season and re-express it in a different era's run environment — 1184 cross-era stat projections. Rate stats are re-based to the target year's league averages (the OPS+/ERA+ idea); counting totals are shown as actually played. Every page includes a live slider to drop the season into any year in MLB history.

A model, not a prediction. This re-expresses rate stats against a target year's league run environment only. It does not account for competition depth, pitch velocity, modern arsenals, conditioning, or in-game adjustments — so a higher translated line means a higher-offense era, not that the player would actually perform better against modern pitching.

Hitters

Al Kaline (1962) Al Simmons (1930) Albert Pujols (2008) Alex Rodriguez (2007) Babe Ruth (1920) Barry Bonds (2004) Billy Williams (1972) Bob Johnson (1939) Carl Yastrzemski (1970) Charlie Gehringer (1936) Chipper Jones (1999) David Ortiz (2007) Dick Allen (1966) Duke Snider (1954) Eddie Collins (1920) Eddie Mathews (1953) Eddie Murray (1982) Edgar Martinez (1995) Frank Robinson (1966) Frank Thomas (1994) Fred McGriff (1994) Freddie Freeman (2017) Gary Sheffield (1996) George Brett (1980) Hank Aaron (1971) Hank Greenberg (1938) Harmon Killebrew (1961) Harry Heilmann (1923) Jeff Bagwell (1994) Jim Thome (2002) Jimmie Foxx (1932) Joe DiMaggio (1939) Joe Morgan (1976) Joey Votto (2012) Johnny Mize (1939) Ken Griffey (1994) Lance Berkman (2001) Larry Walker (1997) Lou Gehrig (1927) Manny Ramirez (2000) Mark McGwire (1998) Mel Ott (1929) Mickey Mantle (1957) Miguel Cabrera (2013) Mike Schmidt (1981) Mike Trout (2018) Nap Lajoie (1901) Paul Waner (1928) Pete Rose (1969) Rafael Palmeiro (1999) Reggie Jackson (1969) Rickey Henderson (1993) Rogers Hornsby (1925) Sam Crawford (1911) Shoeless Joe Jackson (1911) Stan Musial (1948) Ted Williams (1941) Todd Helton (2000) Tris Speaker (1922) Ty Cobb (1911) Vladimir Guerrero (2000) Wade Boggs (1987) Willie Mays (1954) Willie McCovey (1969) Willie Stargell (1973)

Pitchers

Adam Wainwright (2014) Andy Pettitte (2005) Babe Adams (1909) Bert Blyleven (1973) Bill Byrd (1948) Billy Pierce (1955) Bob Feller (1946) Bob Friend (1963) Bob Gibson (1968) Bret Saberhagen (1989) CC Sabathia (2008) Carl Hubbell (1933) Charles Bender (1910) Chris Sale (2018) Christy Mathewson (1909) Claude Passeau (1945) Clayton Kershaw (2016) Cliff Lee (2011) Curt Schilling (1992) Cy Young (1908) David Cone (1988) Dazzy Vance (1928) Dennis Eckersley (1975) Dizzy Dean (1934) Don Drysdale (1968) Don Sutton (1972) Dutch Leonard (1945) Dwight Gooden (1985) Ed Walsh (1910) Eddie Plank (1909) Eppa Rixey (1916) Felix Hernandez (2014) Fergie Jenkins (1968) Gaylord Perry (1972) Gerrit Cole (2019) Greg Maddux (1994) Hal Newhouser (1945) Hilton Smith (1937) Hoyt Wilhelm (1965) J. R. Richard (1979) Jack Quinn (1910) Jacob deGrom (2018) Jerry Koosman (1968) Jim Bunning (1967) Joe Williams (1918) Johan Santana (2008) John Smoltz (1992) Jon Matlack (1978) Juan Marichal (1969) Justin Verlander (2022) Kevin Brown (1996) Kid Nichols (1904) Lefty Grove (1931) Max Scherzer (2022) Mike Garcia (1949) Mike Mussina (1992) Nolan Ryan (1981) Orel Hershiser (1985) Paul Derringer (1939) Pedro Martinez (2000) Pete Alexander (1915) Randy Johnson (1997) Rick Reuschel (1985) Robin Roberts (1952) Roger Clemens (2005) Ron Guidry (1978) Roy Halladay (2011) Roy Oswalt (2001) Rube Waddell (1905) Sandy Koufax (1966) Satchel Paige (1934) Shane Reynolds (1994) Stephen Strasburg (2017) Steve Carlton (1972) Steve Rogers (1973) Tim Hudson (2003) Tom Glavine (1998) Tom Seaver (1971) Tommy John (1968) Walter Johnson (1913) Warren Spahn (1953) Whitey Ford (1958) Willie Foster (1926) Zack Greinke (2015) Zack Wheeler (2024)