Rebuilds usually consist of two things: a willingness to punt several future seasons, and a crop of players that can help you acquire young, controllable talent. Windows open and close all the time in baseball, but the Mariners have that one window that slightly stays open no matter how hard your push down on it. By the time a rebuild would come full circle for Seattle, a 39-year-old Robinson Canó will still be earning $24 million per season, Kyle Seager‘s $18 million AAV will have just come off the books, and the likes of Mitch Haniger and Marco Gonzales will be entering their 30s.