Walker graduated from Harlequins Academy and joined the from Leicester Tigers in 2010.
After making his senior club debut in September 2011, he has, as of August 2016, made 52 appearances and scoring 23 tries.
In the 2015/16 season, Walker finished as Harlequins’ top try scorer with 13 tries from his 16 appearances.
August 2016 saw him re-sign with the Harlequins.
(LS August 2016)
|2021 - present|
|2019 - 2020|
|2013 - 2021|