The emergence of Jimmy Nicholl at right-back in 1975–76 meant that Forsyth missed all of September, October and November 1975, but he regained his place in the team from December onwards, playing in every game until the end of the season, including Manchester United's run to the 1976 FA Cup Final. He scored three times during the 1975–76 season, the first two in consecutive 3–1 home wins at the end of January (in the FA Cup against Peterborough United and in the league against Birmingham City) and the other in a 4–0 home win over West Ham United at the end of February.