[4] Although hampered by an ankle injury which kept him out of premier league,[5] Walsh was able to make his début at halfback in round 12 against the Sydney Roosters.

Wearing jumper number 14, Walsh scored the opening try against the Gold Coast Titans on his Penrith debut.

[8] After two seasons at St Helens Walsh joined fellow Super League side Catalans Dragons.

A mainstay of the team in 2017, Walsh was injured in the game against the Hull Kingston Rovers in the third round of the 2018 season and on 24 April 2018 he announced his retirement from playing on medical advice.

Walsh currently plays as a halfback for Central Charlestown Butcher Boys in the Newcastle Rugby League first grade competition.