At the end of 1974, West Ham manager John Lyall signed Taylor for £40,000.
He was able to play in West Ham's FA Cup campaign when they joined the competition at the third round stage in January 1975, even though Rochdale's lower league status meant that they had started two rounds earlier.
Taylor had been injured during Rochdale's FA Cup matches and was therefore not cup-tied.

West Ham progressed to the quarter finals and on 8 March 1975 Taylor scored both goals, in what was only his fifth West Ham game, as they beat Arsenal 2–0 at Highbury.
The semi-final against Ipswich Town ended goalless and went to a replay at Stamford Bridge on 9 April 1975, with Taylor again scoring both goals in a 2–1 win, the second of which clinched a place in the Wembley final with just eight minutes to go.

In the final on 3 May 1975, West Ham played Fulham, who were a division below them, and the game was tightly-contested until Taylor scored two goals which won West Ham the FA Cup.
In the 61st minute, Billy Jennings hit a low, outswinging shot from 25 yards which Fulham goalkeeper Peter Mellor could only parry across his goal.
Taylor, following up, had to check his run to reach the rebound, but managed to get his foot around the ball and place a low drive through Mellor's legs and into the net.
Three minutes later, Graham Paddon again hit a shot from a wide left position at the Fulham goal, but this time it was more directly at Mellor, who stopped it but failed to hold on.
Once more, Taylor was following up and he guided the rebound into the top of the net.
Taylor made headlines as West Ham won 2–0, especially as he had scored three consecutive FA Cup braces and had been a player in the lowest division of English football just six months previously.
He was the subject of "rags to riches"-style features in the press after the final.
At the end of 1974, West Ham manager John Lyall signed Taylor for £40,000. He was able to play in West Ham's FA Cup campaign when they joined the competition at the third round stage in January 1975, even though Rochdale's lower league status meant that they had started two rounds earlier. Taylor had been injured during Rochdale's FA Cup matches and was therefore not cup-tied.
West Ham progressed to the quarter finals and on 8 March 1975 Taylor scored both goals, in what was only his fifth West Ham game, as they beat Arsenal 2–0 at Highbury. The semi-final against Ipswich Town ended goalless and went to a replay at Stamford Bridge on 9 April 1975, with Taylor again scoring both goals in a 2–1 win, the second of which clinched a place in the Wembley final with just eight minutes to go.
In the final on 3 May 1975, West Ham played Fulham, who were a division below them, and the game was tightly-contested until Taylor scored two goals which won West Ham the FA Cup. In the 61st minute, Billy Jennings hit a low, outswinging shot from 25 yards which Fulham goalkeeper Peter Mellor could only parry across his goal. Taylor, following up, had to check his run to reach the rebound, but managed to get his foot around the ball and place a low drive through Mellor's legs and into the net. Three minutes later, Graham Paddon again hit a shot from a wide left position at the Fulham goal, but this time it was more directly at Mellor, who stopped it but failed to hold on. Once more, Taylor was following up and he guided the rebound into the top of the net. Taylor made headlines as West Ham won 2–0, especially as he had scored three consecutive FA Cup braces and had been a player in the lowest division of English football just six months previously. He was the subject of "rags to riches"-style features in the press after the final.
Alan Taylor (footballer, born 1953)