In the 21st century there is only one major league pitcher, Pat Venditte of the Seattle Mariners, who regularly pitches with both arms. Venditte became the 21st century's first switch pitcher in the major leagues with his debut on June 5, 2015 against the Boston Red Sox, pitching two innings, allowing only one hit and recording five outs right-handed and one out left-handed. During his career, an eponymous "Venditte Rule" was created restricting the ability of a pitcher to change arms in the middle of an at-bat.