Through the 2008 season:
1) Mark McGwire - Oakland Athletics and St. Louis Cardinals.
2) Jimmie Foxx - Philadelphia Athletics and Boston Red Sox.
3) Alex Rodriguez - Seattle Mariners, Texas Rangers, and New York Yankees.
4) Ken Griffey Jr. - Seattle Mariners and Cincinnati Reds.
5) Jim Thome - Cleveland Indians, Philadelphia Phillies, and Chicago White Sox.
6) Johnny Mize - St, Louis Cardinals and New York Giants.
7) Greg Vaughn - Cincinnati Reds and San Diego Padres.
8) Albert Belle - Chicago White Sox and Cleveland Indians.
9) Shawn Green - Toronto Blue Jays and Los Angeles Dodgers.
10) Andres Galarraga - Colorado Rockies and Atlanta Braves.
11) Reggie Jackson - Oakland Athletics and New York Yankees.
12) Rafael Palmeiro - Baltimore Orioles and Texas Rangers.
13) Jose Canseco - Oakland Athletics and Toronto Blue Jays.
14) Rocky Colavito - Cleveland Indians and Detroit Tigers.
15) Manny Ramirez - Cleveland Indians and Boston Red Sox.
16) Jason Gianbi - Oakland Athletics and New York Yankees.
17) Gary Sheffield - Florida Marlins and Los Angeles Dodgers.
18) Darrell Evans - Atlanta Braves and Detroit Tigers.
19) Mike Piazza - Los Angeles Dodgers and New York Mets.
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In MLB, Mark McGwire had 34 home runs for the Oakland Athletics and 24 home runs for the St. Louis Cardinals in 1997.
Roger Maris hit 61 home runs in the 1961 season.
Dave Klingman holds the record for most home runs hit during a retirement season. He hit 35 home runs in his 1987 final season.
Mark McGwire had over 70 home runs in one season
No ... the most home runs Cobb hit in a season was 12 in 1921 and 1925.
Darrell Evans Alex rodriguez
Jim Thome
In MLB through the 2008 season, the record for home runs by a team in one season is 264 by the 1997 Seattle Mariners.
Dave Klingman holds the record for most home runs hit during a retirement season. He hit 35 home runs in his 1987 final season.
Sammy Sosa is a former Dominican professional Baseball player and legend who played right field for four Major League teams throughout his extensive eighteen year career. He was only the fifth player ever to reach 600 home runs, and the only player to hit 60-plus home runs in a single season three different times.
Many MLB teams have scored runs with multiple players in the same inning. Many MLB teams have also had multiple home runs by different players occur in the same inning, including teams like the Yankees, Blue Jays, and Red Sox.