Complex sentence: He started as a trainee with Sunderland, but did not play any League games with them, and he moved to Peterborough United for the 1976--77 season, going on to make 195 League appearances for the Posh.
Split into simpler sentences: He started as a trainee with Sunderland, but did not play any League games with them, and he moved to Peterborough United, first playing a league game for them in 1976--77. He went on to make 195 League appearances for the Posh.