Maybe with some big games coming up the coach wants to give each a chance to stake a claim for the vacancy left by JJB which means some rotation/resting. Until the Salford game Pitts , Clarkson and Hauraki had each played 3 games with Hauraki leading in all main stats.
Pitts had done enough in recent games to justify his selection ahead of Clarkson so I guess Clarkson was told impress against Salford if you want to make the
team! Did it work? Hauraki offers by far the
greatest impact of the three and not just for his error/penalties in the Wigan game so the other spot should be between Pitts and Clarkson!