Forward Scott Hartnell has announced his retirement after playing 17 NHL seasons. Hartnell posted news of his retirement to Twitter today, just a few days before the regular season. The 36-year-old Hartnell was unsigned after spending last season in Nashville. Hartnell put up 327 goals and 380 assists for 707 points in 1,249 regular-season games with the Predators, Philadelphia Flyers and Columbus Blue Jackets.