Only a minor leaguer right now but this guy pitches with both hands......driving the switch hitter crazy.

http://www.shoonsports.com/switch-hitter-vs-switch-pitcher-pat-venditte/

There was a pitcher for the phillies some time ago that was a switch thrower in hs and college

Greg Allen Harris (born November 2, 1955 in Lynwood, California) is a former pitcher in Major League Baseball for the New York Mets, Cincinnati Reds, Montreal Expos, San Diego Padres, Texas Rangers, Philadelphia Phillies, Boston Red Sox and New York Yankees from 1981 to 1995. Harris pitched in 703 games in his career, starting 98. He pitched for the Padres in the 1984 World Series, which they lost to the Detroit Tigers in five games.

Harris is best known as the only pitcher in the modern era to pitch with either arm. A natural right-hander, by 1986 he could throw well enough left-handed that he felt he could pitch with either hand in a game, but the opportunity did not arise. Harris wasn't allowed to throw lefty in a regular-season game until September 28, 1995, the next-to-last game of his career, for the Expos. In the ninth inning, Harris retired Reggie Sanders pitching right-handed, then switched to his left hand for the next two hitters, Hal Morris and Ed Taubensee, who both batted lefty. Harris walked Morris but got Taubensee to ground out. He then went back to his right hand to retire Bret Boone to end the inning.  

    I only remember this guy because when he was with Boston the radio talk show people were constantly asking whether or not we'd ever see this.

Tony Mullane...the Apollo of the Box

<<Mullane suffered an injury to his right arm and managed to teach himself to throw left-handed. Mullane resumed throwing right-handed once the injury healed, and he would even alternate throwing right-handed and left-handed in the same game, which was easy for him since he did not wear a glove. Mullane would face the batter with both hands on the ball, and then use either one to throw a pitch.>>

Wasn't billy Wagner a RHer?

He learned to pitch lefty when he was 8 after he broke his arm for the 2nd time...  But yes, he was a natural righty.

Brett Cecil, a young, fairly mediocre lefty for Toronto, is also naturally right-handed.