Frankie Frisch
Frisch played in 8 World Series and 50 total games for the New York Giants (4 WS: 1921, 1922, 1923, 1924) and St. Louis Cardinals (4 WS: 1928, 1930, 1931, 1934). He had a career batting average of .294 in World Series play with 58 hits in 197 at bats, 10 doubles, 3 triples, 0 home runs, and 10 RBIs.
I'm not sure about World Series specifically, but the most in any postseason round is Chipper Jones, 92
Chipper Jones has the most career postseason games played for a National League player with 92.
There have been many, including Frank Robinson, the Most Valuable Player of the 1966 World Series, and Dusty Baker, who played on back-to-back National League champions in 1977 and 1978.
Carlos Delgado with 9.
Yogi Berra.
Musial
Anson Carter last played for HC Lugano in the Swiss Nationalliga A. (National League A)
Greg Maddux has: Played Himself - Chicago Cubs Pinch Runner in "1989 National League Championship Series" in 1989. Played Himself - Chicago Cubs Pitcher in "1989 National League Championship Series" in 1989. Played Himself - Chicago Cubs Pinch Hitter in "Sunday Night Baseball" in 1990. Played Himself - Baseball Player in "Baseball Tonight" in 1990. Played Himself - Atlanta Braves Pitcher in "Sunday Night Baseball" in 1990. Played Himself - Los Angeles Dodgers Pitcher in "Sunday Night Baseball" in 1990. Played Himself - Chicago Cubs Pitcher in "Sunday Night Baseball" in 1990. Played Himself - San Diego Padres Pitcher in "Sunday Night Baseball" in 1990. Played Himself - NL Pitcher in "1992 MLB All-Star Game" in 1992. Played Himself - Atlanta Braves Pitcher in "1993 National League Championship Series" in 1993. Played Himself - NL Pitcher in "1994 MLB All-Star Game" in 1994. Played Himself - Atlanta Braves Pitcher in "1995 National League Championship Series" in 1995. Played Himself - NL Pitcher: Atlanta Braves in "1996 MLB All-Star Game" in 1996. Played Himself - Atlanta Braves Pitcher in "1996 World Series" in 1996. Played Himself -Atlanta Braves Pitcher in "1996 National League Championship Series" in 1996. Played Himself - Atlanta Braves Pitcher in "1996 National League Championship Series" in 1996. Played Himself - NL Starting Pitcher: Atlanta Braves in "1997 MLB All-Star Game" in 1997. Played Himself - Atlanta Braves Pitcher in "1997 National League Championship Series" in 1997. Played Himself - Atlanta Braves Pitcher in "1998 National League Championship Series" in 1998. Played Himself - NL Starting Pitcher: Atlanta Braves in "1998 MLB All-Star Game" in 1998. Played himself in "ESPN SportsCentury" in 1999. Played Himself - Atlanta Braves Pitcher in "1999 National League Championship Series" in 1999. Played Himself - NL Pitcher: Atlanta Braves in "2000 MLB All-Star Game" in 2000. Played Himself - Atlanta Braves Pitcher in "2001 National League Championship Series" in 2001. Played Himself - Newly Elected Baseball Hall of Famer in "Mike and Mike in the Morning" in 2005. Played himself in "Cubs Forever: Celebrating 60 Years of WGN-TV and the Chicago Cubs" in 2008. Played Himself - Los Angeles Dodgers Pitcher in "2008 National League Championship Series" in 2008. Played himself in "Bluetopia: The LA Dodgers Movie" in 2009. Played himself in "Prime 9" in 2009.
Lee Lacy has: Played Himself - Los Angeles Dodgers Pinch Runner in "1974 National League Championship Series" in 1974. Played Himself - Los Angeles Dodgers Pinch Hitter in "1974 World Series" in 1974. Played Himself - Los Angeles Dodgers Right Fielder in "1977 World Series" in 1977. Played Himself - Los Angeles Dodgers Pinch HItter in "1977 World Series" in 1977. Played Himself - Los Angeles Dodgers Pinch Hitter in "1977 National League Championship Series" in 1977. Played Himself - Los Angeles Dodgers Pinch Hitter in "1978 National League Championship Series" in 1978. Played Himself - Pittsburgh Pirates Left Fielder in "1979 World Series Video: Pittsburgh Pirates vs Baltimore Orioles" in 1979. Played Det. Soud in "L.A. Heat" in 1989. Played Baseball Player in "Talent for the Game" in 1991.
Yogiberra is the national league player who has most world championships.
Jerry Koosman has: Played Baseball Player in "Toast of the Town" in 1948. Played Himself - NL Pitcher in "1968 MLB All-Star Game" in 1968. Played Himself - New York Mets Pitcher in "1969 National League Championship Series" in 1969. Played Himself - NL Pitcher in "1969 MLB All-Star Game" in 1969. Played Himself - New York Mets Pitcher in "1969 World Series" in 1969. Played Himself - New York Mets Pitcher in "1973 World Series" in 1973. Played Himself - New York Mets Pitcher in "1973 National League Championship Series" in 1973. Played Himself - Chicago White Sox Pitcher in "1983 American League Championship Series" in 1983. Played himself in "Prime 9" in 2009.
During World Series games played in National League ballparks, National League rules are enforced, and the pitchers will both bat like any other position player. During World Series games played in American League ballparks, American League rules are in effect, and both teams have the option use a designated hitter and the pitcher will not bat if this option is taken. If, however, a DH is later put into a game as a position player, the DH option is then lost, and the pitcher must bat.
Jason Marquis has: Played Himself - Chicago Cubs Pitcher in "Sunday Night Baseball" in 1990. Played Himself - Baseball Player in "Baseball Tonight" in 1990. Played Himself - Atlanta Braves Pinch Runner in "Sunday Night Baseball" in 1990. Played Himself - Atlanta Braves Pitcher in "Sunday Night Baseball" in 1990. Played Himself - Atlanta Braves Pinch Runner in "2001 National League Championship Series" in 2001. Played Himself - Atlanta Braves Pitcher in "2001 National League Championship Series" in 2001. Played Himself - St. Louis Cardinals Pitcher in "2004 World Series" in 2004. Played Himself - St. Louis Cardinals Pitcher in "2004 National League Championship Series" in 2004. Played himself in "2009 MLB All-Star Game" in 2009.