Here is the wiki about all the names in the game...
The Atlanta Braves are famous dance DJs, such as Sasha & Digweed (John Smoltz and closer Mike Stanton). A pitcher for the team is named G. Park, presumably in reference to Atlanta's famed Grant Park (Steve Avery). In addition, D. Crime and D. Neon likely refer to Fred "the Crime Dog" McGriff and "Neon" Deion Sanders, respectively.
The Baltimore Orioles pay tribute to Baltimore native John Waters with B. Divine (Harold Reynolds), P. Flamingo (Mike Mussina), M. Trasho (Mike Pagliarulo), and H. Spray (pitcher Jim Poole), as well as Waters himself standing in for Cal Ripken Jr.
The Boston Red Sox contain members from the show Cheers. Cliff Claven (Scott Bankhead), Norm Peterson (pitcher Greg Harris), and Sam Malone (closer Jeff Russell) are all present. Also included are Boston landmarks B. Common (Luis Rivera), M. Harvard (Tony Peña) and figures from early American history J. Adams (Billy Hatcher), J. Hancock (Rob Deer), A. Hamilton (Scott Fletcher). S.Heat stands in for flamethrower Roger Clemens.
The California Angels have famous actors on their team: F. Astaire (Chad Curtis), H. Bogart (Chili Davis), and J. Wayne (J. T. Snow).
The Chicago Cubs has game director Brian Ullrich standing in for Ryne Sandberg. The bullpen has some seemingly generic names, such as P. Drifter (Jose Guzman), T. Yokel (Frank Castillo), and R. Steel (Dan Plesac).
The Chicago White Sox are former basketball players from St. John's University: M. Sealy (Ozzie Guillén), C. Mullin (Ellis Burks), and M. Jackson (Lance Johnson).
The Cincinnati Reds are writers: B. Stoker (Tom Browning), P. **** (Scott Service), and E. Queen (Chris Sabo).
The Cleveland Indians have famous actresses and glamour girls on their team: A. Margret (Paul Sorrento), A. Hepburn (Sandy Alomar Jr.), M. Monroe (Reggie Jefferson), and G. Garbo (Jeff Mutis).
The Colorado Rockies contain famous names from horror movies, including G. Romero (Kent Bottenfield), B. Lugosi (Alex Cole), and T. Savini (Bruce Ruffin).
The Detroit Tigers are famous Motown singers: A. Franklin (John Doherty), G. Knight (Bill Gullickson) and R. Smokey (Gary Thurman).
The Florida Marlins have a unique list of players like R. Harrison filling in for Gary Sheffield and L. Vogelman filling in for Jeff Conine. The pitching staff includes S. McDonald standing in for Robb Nen, J. Bafus standing in for Charlie Hough, and G.Valkenar standing in for closer Bryan Harvey.
The Houston Astros are cartoonists: G. Larson (Todd Jones), W. Eisner (Craig Biggio), and S. Lee (Rick Parker).
The Kansas City Royals are based on U.S. presidents (the third batter is D. Ike, whose real-life counterpart is DH Hall of Famer George Brett). The pitching staff includes Bill Clinton standing in for Kevin Appier, George H. W. Bush standing in for David Cone, and Ronald Reagan standing in for Hipolito Pichardo.
The Los Angeles Dodgers are based on punk rock pioneers from Los Angeles and other areas around California including Exene Cervenka (José Offerman), John Doe (Mike Piazza), DJ Bonebrake of X (Brett Butler), Poison Ivy (Mitch Webster) and Lux Interior of The Cramps (Eric Karros), Jello Biafra (Ricky Trlicek), Klaus Flouride of the Dead Kennedys (Pedro Astacio), and Lee Ving of Fear (Orel Hershiser).
The Milwaukee Brewers have a pitching staff consisting of superhero "secret identities": P. Parker (Cal Eldred), C. Kent (Jaime Navarro), and B. Wayne (Ricky Bones), while their position players are fictional secret agents and detectives: J. Rockford (Pat Listach), J. Bond (Dave Nilsson), and P. Columbo (Dickie Thon)
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The Minnesota Twins are not named for famous sets of twins. The players' names are based on celebrities of various backgrounds, from actor Adam West (Kent Hrbek), guitarist Jimi Hendrix (Dave Winfield) and pitcher W. Herzog (Rick Aguilera).
The Montreal Expos are people from the 1980s music scene in Manchester, England, including Bernard Sumner|B. Summer (Moisés Alou), and Johnny Marr|J.Marr (Larry Walker).
The New York Mets are based on punk rock pioneers from New York City including Johnny Thunders (Eddie Murray), Joey Ramone (Jeff Kent), Tom Verlaine (Bobby Bonilla), and Jerry Nolan (Anthony Young).
The New York Yankees have the nicknames of famous Yankee greats, such as Bambino (Danny Tartabull), and New York boroughs such as S.Island (Spike Owen).
The Oakland Athletics apparently hired more authors: H. Ernest (Mark McGwire), L. Byron (Mike Aldrete), M. Twain (Brent Gates), and L. Tolstoy (Dave Henderson).
The Philadelphia Phillies feature a Rocky homage in R. Balboa (Darren Daulton) and A. Creed (Dave Hollins). They also have a Philadelphia landmark – L. Bell (Ricky Jordan) – and some of the musicians produced by Phil Spector: D. Love (Lenny Dykstra), B. Medley (Wes Chamberlain), as well as Spector himself (John Kruk).
The Pittsburgh Pirates are named after characters from the soap opera Coronation Street' such example Emily Bishop|E.Bishop (Steve Cooke), Ken Barlow|K.Barlow (Tom Foley) and Phyllis Pearce|P.Pearce (Lonnie Smith).
The San Francisco Giants are members of Software Creations, the team that developed the game such example Michael Webb and Richard Kay stand in for (Willie McGee) and (Kirt Manwaring) respectively.
The San Diego Padres are based on punk rock pioneers from England including Billy Idol|B.Idol (Ricky Gutiérrez), Dave Vanian|D.Vanian (Derek Bell), Johnny Rotten (Jeff Gardner), and Sid Vicious (Archi Cianfrocco).
The Seattle Mariners have Nintendo of America employees on their team such as J. Tingdale who stands in for Randy Johnson, D.Owsen who stands in for Omar Vizquel, and J.Hurt filling in for Jay Buhner.
The St. Louis Cardinals are comedians: H. Moe (Bob Tewksbury), O. Hardy (famous shortstop Ozzie Smith).
The Texas Rangers, appropriately, have a Western theme (their best pitcher, T. Mix, "fills in" for Kevin Brown). S.Jackson stands in for (Nolan Ryan).
The Toronto Blue Jays are players from the Wigan Warriors Rugby league team: E. Hanley (Darnell Coles), M. Offiah (Danny Cox), D. Betts (Paul Molitor).