Complex sentence: Fenton succeeded in getting the club once again promoted to the top level of English football in 1958, and, with the considerable input of player Malcolm Allison, helped develop both the initial batch of future West Ham stars and West Ham's approach to the game.
Split into simpler sentences: Fenton succeeded in getting the club once again promoted to the top level of English football in 1958. With the considerable input of player Malcolm Allison, Fenton helped develop both the initial batch of future West Ham stars and West Ham's approach to the game.