The Seattle Mariners placed outfielder Mitch Haniger (back) on the 45-day injured list. Haniger is not in the team's player pool for the start of big league camps later this week, but the Mariners can add him later if they so desire. The 29-year-old broke out in 2018, but injuries derailed his 2019 season, and he's recovering from a second core surgery and a back procedure, so there's no guarantee that he'll be ready for Opening Day in late July. With the possibility that Haniger doesn't see ...