The easy, easy case for Mookie Betts

In both the 2017-18 and 2018-19 off-seasons, the marquee move for the St. Louis Cardinals followed a familiar pattern--the Cardinals acquired a premium, middle-of-the-order offensive threat with dwindling remaining years of club control in exchange for a handful of decent, already MLB-caliber young players and prospects. In December 2017, the Cardinals traded four prospects, two…