Former Blue Jackets star Rick Nash retires due to 'unresolved' concussion issues

(CBS Sports) -- After 15 seasons in the NHL, two Olympic gold medals and one World Championship, Rick Nash has called it a career.As TSN's Darren Dreger reported Friday, the longtime Columbus Blue Jackets and New York Rangers star has announced his retirement via Top Shelf Sports Management, citing "unresolved issues" from a concussion sustained in March 2018."Due to unresolved issues/symptoms from the concussion sustained last March," Top Shelf's Joe Resnick told Dreger, "Rick Nash will be forc