Alex Dunbar was running on his own when his knee gave way on Thursday . The former NFL player is now in a medically induced coma and doctors say he will likely never walk again. Scotland face England in the Six Nations for the Calcutta Cup on Saturday .
Alex Dunbar was running on his own when his knee gave way on Thursday . The injury puts the Scotland centre in doubt for the 2015 Rugby World Cup . Scotland face England in the Six Nations for the Calcutta Cup on Saturday .