Leach is perhaps best remembered for being one of only five players, the first Flyer, and the only non-goaltender to win the Conn Smythe Trophy, awarded to the MVP of the Stanley Cup playoffs, as a member of the losing team in the Final, following Roger Crozier (Detroit Red Wings, in 1966) and Glenn Hall (St. Louis Blues, 1968) and preceding Ron Hextall (Philadelphia, 1987) and Jean-Sebastien Giguere (Mighty Ducks of Anaheim, 2003). He earned this distinction in 1976 while setting NHL records for most goals in a single post-season, with 19 in 16 games, surpassing the Montreal Canadiens' Newsy Lalonde's 1919 mark of 17 goals, and longest consecutive games goal-scoring streak in the playoffs at 10, bettering the 7 set by another Canadien, Maurice Richard, as his team went on to be swept in the Final by, ironically, Montreal. The latter record remains unrivaled, but the former was matched by the Edmonton Oilers' Jari Kurri in 1985, although Leach established it in 2 fewer games.