17th October 2017, 09:00 | Leigh
The 28-year-old back rower had two years left on his contract with the Tigers but has struggled to hold down a spot and, after making just seven appearances from the bench in their table-topping season, has left by mutual agreement and signed a two-year deal with the relegated Centurions.
Leigh coach Neil Jukes said: "Larne is a big, powerful, explosive middle who will really add to the dynamics of the team.
"He comes with a wealth of experience and good values inherited from playing for some elite clubs in Huddersfield, Wigan and Castleford.
"Larne will be a really good asset to us moving forward as we try and achieve our goal of regaining our Super League place."
Patrick scored 32 tries in 147 appearances for the Giants and also had a season-long loan with Wigan Warriors in 2015 when he played in the side beaten by Leeds Rhinos in the Betfred Super League Grand Final.