Complex sentence: The following season saw the team endure a poor run of form, and McAllister was sacked after a run of 5 defeats in a row, including the club's first defeat to non-league opponents, Histon, in the 2nd round of the FA Cup.
Split into simpler sentences: The following season saw a poor run of results, and McAllister was sacked after a run of 5 defeats in a row. These included the club's first defeat to non-league opponents, Histon, in the 2nd round of the FA Cup.