By my research reckoning a while back (aided immeasurably by Baseball Reference), Dave was the first de facto DH in Mets history to contribute to a win. Lately Gary Cohen has referred to the phenomenon in question as a zombie at-bat: someone pinch-hits for the pitcher, the team bats around and the pinch-hitter, who is no longer pinch-hitting for anybody, comes up again in the same inning. A Met has done it nine times, the first of them being Jim Fregosi the week before Marshall, except Fregosi did it in a loss. What made Marshall's accomplishment striking (and why I discovered it) was it took place in what still stands as the greatest comeback by volume the Mets have ever forged, part of the surge from the Mets being down 8-0 at the Astrodome on September 2, 1972, yet coming back to win, 11-8. Marshall walked in his first DF DH PA, then fouled out to end the seven-run eighth that cut the Mets' deficit to 8-7. They went on to score four in the ninth, presumably reawakening in Houston manager Leo Durocher nightmares from 1969. Your other Met DF DHs following Fregosi and Marshall: Mike Cubbage 1981 Howard Johnson 1985 Gregg Jefferies 1991 Vance Wilson 2003 Daniel Murphy 2011 Wilmer Flores 2017 Matt Reynolds 2017 Ken Boswell served much the same function in 1973, except as a pinch-hitter for Duffy Dyer in the ninth at Candlestick. The starting pitcher, trailing 2-1, batted for himself, having homered earlier in the game. It was Tom Seaver, of course. Tom bunted with two on and nobody out, reached safely, scored the tying run and returned to the mound in the bottom of the inning to finish off a complete game win.