The Reds win game one against the Mets, 5 – 2, then complete the sweep as Tony Perez drives in all five runs to defeat the Mets, 5 – 3, in the nitecap. Perez puts the Reds ahead with a three-run homer off Tom Seaver in the 8th. Jim McGlothlin strikes out 12 in the game two win.

On July 11, 1971The Reds win game one against the Mets, 5 – 2, then complete the sweep as Tony Perez drives in all five runs to defeat the Mets, 5 – 3, in the nitecap. Perez puts the Reds ahead with a three-run homer off Tom Seaver in the 8th. Jim McGlothlin strikes out 12 in the game two win.

Source
Baseball Reference July 11