Career
2011-2012: Career with Manly
Daniel Harrison is a former Manly junior who returned to the Sea Eagles in 2011 after several seasons with Canterbury-Bankstown. In 2012, Harrison signed with the Parramatta Eels for 2-years until 2014, starting in 2013. 2013-2014: Career with Parramatta
In June 2013, Harrison was one of 12 Parramatta players that were told that their futures at the club were uncertain by coach, Ricky Stuart.
Despite being told that he may need to look for a new club in 2014, Harrison made his debut for Parramatta in Round 15 against the South Sydney Rabbitohs.
But during to Ricky Stuart leaving he could stay. In March 2014, Harrison was released by the Eels.
2015-: Career with London
On 18 July 2014, Championship side London Broncos announced the signing of Harrison on a 2 year deal until the end of 2016.