4
In MLB, that was 4 against the Philadelphia Athletics on June 3, 1932.
1, Harry Kingman, who played 4 games for the Yankees in 1914. He had 3 official at-bats without a hit, he also walked once.
No one has ever hit more than 4 home runs in single game in the MLB.
Prior to the 2010 MLB post season ... 1) Derek Jeter - 138 games 2) Jorge Posada and Manny Ramirez - 111 games 4) Chipper Jones - 92 games
Greenberg had 31 MLB games where he hit two home runs. His best season was 9 two home run games in 1938, the season he hit 58 home runs. 1 - 1933 3 - 1934 4 - 1935 4 - 1937 9 - 1938 2 - 1939 1 - 1940 4 - 1946 3 - 1947
Prior to their 20th birthday ... 1) Robin Yount - 243 games 2) Mel Ott - 241 games 3) Phil Cavaretta - 220 games 4) Ed Kranepool - 208 games
the San Diego Padres (4)
For starting pitchers in MLB, that would be 4 games. Most MLB teams use a starting rotation of 5 pitchers. Each starting pitcher waits/rests arm while the other four take their turn. So, a starting pitcher in MLB would start every 1 in 5 games.
Ralph Kiner of the 1947 Pittsburgh Pirates. From June 1 to the end of the season, Kiner had 2 three home run games and 9 two home run games. He set an MLB record of 8 home runs in 4 consecutive games that season and had another 4 game stretch where he hit 7 home runs.
15 players have had a 4-homer game in the Majors; no one has ever done it twice.
Through the 2010 season ... 1) Manny Ramirez - 111 playoff games 2) Chipper Jones - 92 3) Andruw Jones - 75 4) David Ortiz - 66