Complex sentence: While with Newcastle United reserves, Morris and teammate Darren Lough were described by coach Adam Sadler as "the next big thing", but he was released by the club in 2010, having never featured in the first team.
Split into simpler sentences: While with Newcastle United reserves, Morris, along with Darren Lough, was described by coach Adam Sadler as "the next big thing". It wasn't until 2010 when Morris was released by the club, having never featured in the first team.