The curtain has closed on the NFL season after the lowest scoring Super Bowl ever played. The trade deadline approaches in an NHL and NBA in a season where the Chicago teams will probably be sellers, rather than buyers. Pitchers and catchers will report next week for MLB spring training — hope springs eternal.This seems to be a fitting time to review the biggest sports cases of 2018: Legalized sports gambling, continued concussion litigation and the college basketball sneaker scandal have all altered the sports …