The biggest news coming out of the Mariners luncheon today was that Seattle will be without their best player for all of spring training and a chunk of April. Mitch Haniger is set to have core surgery this week after suffering a setback this winter.
The surgery has a recovery time of 6-8 weeks and Opening Day is 10 weeks from today. Now, in theory, Haniger could be on the Opening Day roster. But in a realistic sense, it remains unlikely. Even if Haniger suffers no additional setbacks and returns in 8 weeks, he would get 1 week of Spring Training and then be expected to compete against big league pitchers.