Izaac is a product of the Giants' academy system[4] and is the son of former Huddersfield, Sheffield, and Leeds player Anthony Farrell and the brother of current Sheffield Eagles player Joel Farrell In 2017 he made his Challenge Cup début for the Huddersfield Giants against the Swinton Lions.

[5] In 2018 he joined the Batley Bulldogs in the Championship on a season long loan.

[9] He made his debut for Scotland in the defeat to Ireland in October 2024 at Gateshead.

Born in England, Farrell is of Jamaican, Trinidadian and Scottish descent.

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