Who was the last pitcher to throw a perfect game?

Question

On July 23, 2009, Buehrle threw a perfect game against the Tampa Bay Rays at U.S. Cellular Field. It was the eighteenth perfect game in MLB history and Buehrle's second career no-hitter. With the perfect game, Buehrle became the 24th pitcher to throw multiple no-hitters in a career, and the sixth perfect game pitcher who had also thrown another no-hitter, joining Cy Young, Addie Joss, Jim Bunning, Sandy Koufax and Randy Johnson.