Jim Thome
Alex Rodriguez hit his 500th home run off of Kyle Davies of the Kansas City Royals on August 4, 2007.
Willie Mays hit his 500th home run on September 13, 1965 off of Don Nottebart of the Houston Astros.
Alex Rodriguez was 32 years & 8 days old when he hit his 500th on August 4, 2007.
Reggie Jackson
Gary Sheffield
Erine Banks
Willie Mays. Mays hit his 500th home run at the Astrodome on September 13, 1965.
Ernie Banks 500th home run came off of Atlanta Braves righthander Pat Jarvis on May 12, 1970.
Mickey Mantle hit his 500th home run off of Stu Miller of the Baltimore Orioles on May 14, 1967.
On Sept. 17, 2004 Barry Bonds hit his 700th home run against the Padres to join Babe Ruth and Hank Aaron as the only players to hit 700 home runs
Hank Aaron Home Run 755 BaseballThe baseball that Hank Aaron hit for home run number 755 sold at auction for $650,000 in 1999.Below is a list of other noted (unsigned) home run baseballs that sold at auction, (and the year)Babe Ruth 1933 All Star Game - $805,000 (2006)Bonds record breaking 756th home run ball sold at auction for $752,000.Barry Bonds 73rd of season - $450,000. (2001)Mickey Mantle 500th - $144,000. (1996)Ken Griffey Jr. 500th (2004) - Frank Thomas 500th (2007) $0 (both given back to player by fan)
Mickey Mantle hit his 500th home run at Yankee Stadium on May 14, 1967. The solo blast came in the 7th inning against relief pitcher Stu Miller of the Baltimore Orioles. Miller was right-handed so Mantle batted left-handed. This is confirmed by the photograph of the event that you can find at various places.