SYDNEY (AP) — Australian rugby league international and North Queensland Cowboys center Brent Tate announced his retirement Wednesday after failing to recover from a fourth serious knee injury.

Tate was contracted to the National Rugby League team for the 2015 season but the 32-year-old ruptured his right anterior cruciate ligament in the second State of Origin match for Queensland.

Tate says "on the advice from the specialist, I've had to decide to stop playing rugby league, which is unfortunate but necessary if I want to enjoy my post-football life."

Tate played 26 tests for Australia, the first in 2002 and his last in 2013, scoring 16 tries for the Kangaroos.

He also played 229 NRL matches for the Cowboys, Brisbane and New Zealand Warriors and made 23 Origin appearances for Queensland.