4. DTH van der Merwe – Saracens
Van der Merwe had signed a short-term contract with Saracens F.C. following a break-out performance for Canada at the 2007 Rugby World Cup, but would play just one first team game before joining Glasgow Warriors. The all-time top Canada and Glasgow try-scorer also made three appearances for Newcastle in 2017 during another failed Premiership stint in 2015.