#5 Alfie Mawson
When Alfie Mawson made the move from Barnsley to Swansea at the beginning of the 16/17 campaign he was a relatively unknown 22-year-old. He struggled to find a place in the team under Francesco Guidolin but made his way into the starting team under Bob Bradley. Even though Bradley's Swansea were a defensively unstable team, Mawson was a standout performer.
After Bradley's departure, the central defender made himself an integral part of Paul Clement's revolution at Swansea. He managed to score four very important goals for the Swans in their quest to survive in the Premier League.
Besides having the ability to score goals as a defender, Mawson also had a very impressive disciplinary record last season, only getting booked once in 27 appearances. Swansea will look to push on from last year's relegation battle and make their way up the table with Mawson at the heart of their defence.