"On June 4, playing at Connie Mack Stadium against the Phillies, Koufax walked Richie Allen on a very close full-count pitch in the fourth inning. Allen, who was thrown out trying to steal second, was the first and last Phillie to reach base that day. With his third no-hitter in three years, Koufax became only the second pitcher of the modern era (after Bob Feller) to pitch three no-hitters."