Wrexham have been dealt a devastating injury blow ahead of pre-season and that has opened the door for one player to take his golden chance. A positive start to the summer transfer window for Wrexham after signing Arthur Okonkwo and Lewis Brunt has quickly turned sour. On Wednesday evening, the Reds announced that star striker Paul Mullin would miss the club’s pre-season tour of the United States after undergoing surgery to correct a long-term lower back/hamstring injury. Wrexham couldn’t put a timeline on his return, although it is believed the 29-year-old could miss the start of the League O…