The NRL has asked Penrith for a 'please explain' over the handling of Isaah Yeo's head knock and the decision to allow him to play on against Newcastle. Yeo suffered his second blow to the head in as many weeks during Saturday's win over Newcastle. In coming days, he will see a specialist to be assessed. It was originally thought he had been ruled out for the rest of the game after leaving the field in the third minute, having copped a stray elbow from teammate Sione Katoa. The sight of the Panthers' back-rower running back on at the 29-minute mark raised eyebrows, given it came outside the required 15-minute period to undergo a head injury assessment (HIA) and apply for the free interchange. The club insisted Yeo passed his HIA test but was delayed in returning to the fray because he was having stitches applied to a head wound. "We have asked for a report from the doctor and head trainer regarding the process when Isaah was assessed after he came off and the decision-making process to allow him to return to the field," NRL head of football Graham Annesley said.
