Complex sentence: After playing more than 250 games for the club and having a spell as player-coach when Gary Johnson took charge, O'Shea left the club in 1995 to join Northampton Town as player-assistant manager to former Cambridge United manager Ian Atkins.
Split into simpler sentences: After playing more than 250 games for the club and having a spell as player-coach when Gary Johnson took charge, O'Shea left the club in 1995. Following this, he joined Northampton Town as player-assistant manager to former Cambridge United manager Ian Atkins.