Two home runs in an inning by individuals, including Mike Cameron and Brett Boone, same team, same inning.

Yankees five times:
Joe DiMaggio, Yankees, June 24, 1936 (fifth inning)
Joe Pepitone, Yankees, May 23, 1962 (eighth inning)
Cliff Johnson, Yankees, June 30, 1977 (eighth inning); (hit three homers in the game)
Alex Rodriguez, Yankees, Sept. 5, 2007 (seventh inning)
Alex Rodriguez, Yankees, Oct. 4, 2009 (sixth inning); did it only with the Yankees
Current Yankee manager: Aaron Boone, Reds, Aug. 9, 2002 (first inning); Brother Brett also

Dodgers once: Eric Karros, Dodgers, Aug. 22, 2000 (sixth inning)

Giants 8 times:
Pablo Sandoval, Giants, Sept. 18, 2011 (fourth inning)
Juan Uribe, Giants, Sept. 23, 2010 (second inning)
Bengie Molina, Giants, May 7, 2007 (fifth inning)
Willie McCovey, Giants, June 27, 1977 (sixth inning)
Willie McCovey, Giants, April 12, 1973 (fourth inning)
Sid Gordon, Giants, July 31, 1949 (Game 2, second inning)
Hank Leiber, Giants, Aug. 24, 1935 (second inning)
Hack Wilson, Giants, July 1, 1925 (Game 2, third inning)

No Met.

Mike Cameron and Brett Boone, Mariners, May 2, 2002 (first inning): two each, same inning. Cameron hit two more: four in the game.

https://www.mlb.com/news/two-home-runs-in-an-inning/c-266221190

Here is a list of every player to accomplish the feat, including Fernando Tatis, who collected eight RBIs on two swings in the third inning for the Cardinals on April 23, 1999, to become the only player in Major League history with two grand slams in one inning:

• Mark Trumbo, Orioles, April 15, 2016 (seventh inning), Watch >
• Edwin Encarnacion, Blue Jays, July 26, 2013 (seventh inning) Watch >
• Adrian Beltre, Rangers, Aug. 22, 2012 (fourth inning) Watch >
• Kendrys Morales, Angels, July 30, 2012, (sixth inning) Watch >
• Pablo Sandoval, Giants, Sept. 18, 2011 (fourth inning) Watch >
• Juan Uribe, Giants, Sept. 23, 2010 (second inning) Watch >
• Alex Rodriguez, Yankees, Oct. 4, 2009 (sixth inning) Watch >
• Michael Cuddyer, Twins, Aug. 23, 2009 (seventh inning) Watch >
• David Ortiz, Red Sox, Aug. 12, 2008 (first inning) Watch >
• Jim Edmonds, Cubs, June 21, 2008 (fourth inning) Watch >
• Alex Rodriguez, Yankees, Sept. 5, 2007 (seventh inning) Watch >
• Magglio Ordonez, Tigers, Aug. 12, 2007 (second inning) Watch >
• Bengie Molina, Giants, May 7, 2007 (fifth inning) Watch >
• Julio Lugo, Devil Rays, July 22, 2006 (fifth inning) Watch >
• Juan Rivera, Expos, June 19, 2004 (second inning) Watch >
• Reggie Sanders, Pirates, Aug. 20, 2003 (fifth inning) Watch >
• Mark Bellhorn, Cubs, Aug. 29, 2002 (fourth inning) * Watch >
• Aaron Boone, Reds, Aug. 9, 2002 (first inning) Watch >
• Carl Everett, Rangers, July 26, 2002 (seventh inning) Watch >
• Nomar Garciaparra, Red Sox, July 23, 2002 (Game 1, third inning) Watch >
• Jared Sandberg, Devil Rays, June 11, 2002 (fifth inning) Watch >

• Mike Cameron, Mariners, May 2, 2002 (first inning); (hit FOUR homers in the game) Watch >
• Bret Boone, Mariners, May 2, 2002 (first inning) Watch >

• Eric Karros, Dodgers, Aug. 22, 2000 (sixth inning) Watch >
• Fernando Tatis, Cardinals, April 23, 1999 (third inning) Watch >
• Gary Sheffield, Marlins, July 13, 1997 (fourth inning) Watch >
• Mike Lansing, Expos, May 7, 1997 (sixth inning)
• Mark McGwire, Athletics, Sept. 22, 1996 (fifth inning) Watch >
• Dave Nilsson, Brewers, May 17, 1996 (sixth inning)
• Sammy Sosa, Cubs, May 16, 1996 (seventh inning) Watch >
• Jeff King, Pirates, April 30, 1996 (fourth inning) Watch >
• Jeff King, Pirates, Aug. 8, 1995 (second inning)
• Jeff Bagwell, Astros, June 24, 1994 (sixth inning) Watch >
• Joe Carter, Blue Jays, Oct. 3, 1993 (second inning) Watch >
• Carlos Baerga, Indians, April 8, 1993 (seventh inning) * Watch >
• Ellis Burks, Red Sox, Aug. 27, 1990 (fourth inning)
• Dale Murphy, Braves, July 27, 1989 (sixth inning)
• Andre Dawson, Expos, Sept. 24, 1985 (fifth inning)
• Von Hayes, Phillies, June 11, 1985 (first inning) Watch >
• Ray Knight, Reds, May 13, 1980 (fifth inning)
• Andre Dawson, Expos, July 30, 1978 (third inning)
• Cliff Johnson, Yankees, June 30, 1977 (eighth inning)
• Willie McCovey, Giants, June 27, 1977 (sixth inning)
• Lee May, Astros, April 29, 1974 (sixth inning)
• John Boccabella, Expos, July 6, 1973 (Game 1, sixth inning)
• Willie McCovey, Giants, April 12, 1973 (fourth inning)
• Rick Reichardt, Angels, April 30, 1966 (eighth inning)
• Joe Pepitone, Yankees, May 23, 1962 (eighth inning)
• Jim Lemon, Senators, Sept. 5, 1959 (third inning)
• Al Kaline, Tigers, April 17, 1955 (sixth inning)
• Sid Gordon, Giants, July 31, 1949 (Game 2, second inning)
• Andy Seminick, Phillies, June 2, 1949 (eighth inning)
• Joe DiMaggio, Yankees, June 24, 1936 (fifth inning)
• Hank Leiber, Giants, Aug. 24, 1935 (second inning)
• Hack Wilson, Giants, July 1, 1925 (Game 2, third inning)
• Bill Regan, Red Sox, June 16, 1928 (fourth inning)
• Kenny Williams, Browns, Aug. 7, 1922 (sixth inning)
• Jake Stenzel, Pirates, June 6, 1894 (third inning)
• Bobby Lowe, Beaneaters, May 30, 1894 (Game 2, third inning)
• Charley Jones, Red Stockings, June 10, 1880 (eighth inning

* Baerga and Bellhorn are the only players in history to homer from both sides of the plate in one inning.