Through the 2008 season, that would be Reggie Jackson of the New York Yankees who hit 5 HRs in the 1977 Series.
The record for most home runs hit during a World Series is 5, held by Reggie Jackson and Chase Utley.
Robinson's 9 base hits tied the World Series record for most base hits by a player in a 5 game World Series. This is still the record for a 5 game Series ... the last player accomplishing this was Sean Casey of the Tigers in the 2006 World Series.
He still holds the career record for most home runs (18) and RBIs (40) during the World Series. With parity in MLB much greater than it was during Mantle's career, it is unlikely that any player will play in as many World Series as Mantle did -- thus these record should stand for quite a while.
1952 Giants, 4
Derek Jeter
The record for most home runs hit during a World Series is 5, held by Reggie Jackson and Chase Utley.
Robinson's 9 base hits tied the World Series record for most base hits by a player in a 5 game World Series. This is still the record for a 5 game Series ... the last player accomplishing this was Sean Casey of the Tigers in the 2006 World Series.
This is an antique record player
Mariners outfielder Ichiro Suzuki set the record during the 2004 season.
Mickey Mantle of the New York Yankees with 18.
Mickey Mantle with 42 runs scored in 12 World Series.
Most Runs Scored in a World Series through 1988: Reggie Jackson in 1977 - 10.
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ME
It was Cole Hamels, who was named Most Valuable Player of the National League Championship Series and the World Series. He posted a 4-0 record during the postseason.
Mets
Pete Fox