Leonard Marshall joined the Giants as a second-round draft choice out of LSU in 1983 and played in 149 regular-season games and 11 postseason games for the team. He played on the Giants' Super Bowl XXI and XXV title teams and was a Pro Bowler in 1985-86, when he totaled 27.5 sacks.
Marshall was credited with 660 tackles (388 solo). His 79.5 career regular-season sacks place him third in franchise history, behind two Pro Football Hall of Famers: Michael Strahan (141.5) and Lawrence Taylor (132.5, not counting Taylor's 9.5 sacks as a rookie in 1981, the year before they became an official stat).
In 11 postseason games, Marshall recorded 7.0 sacks, which is second in Giants history after Strahan's 9.5. Taylor had 6.5 postseason sacks. Marshall collected 3.0 sacks in both the 1986 and 1990 postseasons, when the Giants won the Super Bowl.