Since the HitTracker era began in 2005, Adam Wainwright of the St. Louis Cardinals has the longest home run as a pitcher. The home run occurred on 8/05/07 against the Washington Nationals and traveled 454 ft.
Ronnie Green of the KC Royals hit the longest home run at Fenway Park in 1987
Mulder was the first pitcher to hit a home run at the new Busch stadium!
babe ruth was a pitcher then he was a left fielder
Derrek Lee claims the longest shot by a Marlin, a 482-foot blast that he hit on June 25, 2000. The longest home run ever hit at Pro Player Stadium was bashed by Andres Galarraga, who crushed a 529-foot shot off Kevin Brown on May 31, 1997.
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Mickey Mantle
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Jim Bagby of the Cleveland Indians hit the first home run by a pitcher in Game 5 of the 1920 World Series.
Here is a post listing the Longest Home Runs ever hit by a Mets player at Shea Stadium http://metsblog.com/metsblog/top-5-longest-home-runs-by-a-met-in-flushing/ Dave Kingman & Mo Vaughn are the winners
Mark McGwire hit home run number 70 off Expos pitcher Carl Pavano.
The record for the most home runs hit by a pitcher in a single season is 9, achieved by Wes Ferrell in 1931.
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