Matt Harvey continues his comeback with the New York Mets. Joe Maddon takes over the Chicago Cubs, and Russell Martin gets a closer look at Toronto's pitching staff. While much of the Northeast and Midwest navigates bitter cold and piles of snow, spring training begins in earnest this week when pitchers and catchers file into camps in Florida and Arizona. World Champion San Francisco is one of four National League teams slated to begin on Thursday, and most of the majors' pitchers and backstops will be in place by this weekend.