After defending MVP Willie Mays opens the scoring with a 1st-inning single, his recent pupil, Pittsburgh’s rookie phenom Roberto Clemente, leads off the bottom of the frame by launching homer #3 off Sal Maglie, a rocket to left center that, according to Rud Rennie of the New York Times, touches down some unspecified distance beyond “the ivy-clad left-centerfield wall to the right of the 406-foot mark.” While the Giants untie the game with a two-run 4th, Maglie is busy shutting down the Bucs, allowing only two runners to reach second base until running out of gas in the 9th. He leaves the game with two on, two out and New York ahead, 3 – 2. Clemente then faces reliever Marv Grissom, who saves the win. Les Biederman of the Pittsburgh Press writes: “Clemente went after Grissom’s first pitch and lined it to Mays, who made the difficult catch seem easy and the fans who had congregated in the aisles left muttering and shaking their heads.”

On May 21, 1955 — After defending MVP Willie Mays opens the scoring with a 1st-inning single, his recent pupil, Pittsburgh’s rookie phenom Roberto Clemente, leads off the bottom of the frame by launching homer #3 off Sal Maglie, a rocket to left center that, according to Rud Rennie of the New York Times, touches down some unspecified distance beyond “the ivy-clad left-centerfield wall to the right of the 406-foot mark.” While the Giants untie the game with a two-run 4th, Maglie is busy shutting down the Bucs, allowing only two runners to reach second base until running out of gas in the 9th. He leaves the game with two on, two out and New York ahead, 3 – 2. Clemente then faces reliever Marv Grissom, who saves the win. Les Biederman of the Pittsburgh Press writes: “Clemente went after Grissom’s first pitch and lined it to Mays, who made the difficult catch seem easy and the fans who had congregated in the aisles left muttering and shaking their heads.”

Source:
Baseball Reference May 21