1. Ken Sio has previously played for the Parramatta Eels, the Newcastle Knights in the NRL, and Hull Kingston Rovers in the Super League.

1. Ken Sio has previously played for the Parramatta Eels, the Newcastle Knights in the NRL, and Hull Kingston Rovers in the Super League.
Ken Sio made his National Rugby League debut in round 26 of the 2011 season, he played on the wing against the Gold Coast Titans, scoring his debut try in the same match.
Ken Sio was seen as the shining light in 2012, which was a terrible season for the Parramatta Eels as they finished last on the table for the first time since 1972, when he scored 13 tries and subsequently came 6th in the NRL's top try scorers table for the season.
Ken Sio was injured in round 1 of the 2013 season against the Warriors, in which he was replaced by debutant, Vai Toutai.
Ken Sio returned from injury to play 20 games for Parramatta in 2013 and scored 10 tries but it was not enough to save Parramatta from a second consecutive wooden spoon.
On 31 July 2014, Ken Sio signed a contract to play for Super League club Hull Kingston Rovers from 2015.
Ken Sio then scored his first-ever Super League try against the Wakefield Trinity Wildcats in round 2.
Ken Sio represented the club in the 2015 Challenge Cup Final.
Ken Sio suffered relegation from the Super League with Hull Kingston Rovers in the 2016 season, due to losing the Million Pound Game by the Salford Red Devils.
On 31 October 2016, Ken Sio signed a 2-year contract to return to the National Rugby League with the Newcastle Knights.
Ken Sio failed to come to terms with the Newcastle Knights over a new deal to remain at the club, after a well documented dispute over a contract that they had offered him previously.
Ken Sio played in the 2019 Super League Grand Final defeat by St Helens at Old Trafford.