Bailey's was a bad miss, the big prop opting to try and bulldoze the brave Mathers out of the way, when a step either side of the Wolves full-back would surely have brought a try.
Yorkshire captain Darren Gough , who will welcome Vaughan back for his side's battle to remain in County Championship Division One, was shocked he had decided to step down.
The former Rotherham Titans man will start at open-side flanker in Treviso after previously being tipped to make the step up to international level by Leeds head coach Neil Back.