Retired Maroons stalwart Corey Parker says he has a simple formula for choosing who to replace injured Qld stars Johnathon Thurston and Darius Boyd for Origin Game Three next month.

Thurston has  been ruled out of the rest of the season with a shoulder injury and Boyd’s broken thumb will keep him out of the Origin decider on July 12.

Parker (pictured) says his philosophy towards the crucial selections is simple, pick the players the Blues would least like to see line up against them.