Complex sentence: He played in the Premier League for Arsenal and Crystal Palace, as well as playing in the Football League for Manchester City, Northampton Town and Stockport County as well as playing in non-league for Kettering Town, Nuneaton Town and Corby Town.
Split into simpler sentences: He played in the Premier League for Arsenal and Crystal Palace, as well as playing in the Football League for Manchester City, Northampton Town and Stockport County. He also played non-league football for Kettering Town, Nuneaton Town and Corby Town.