Here's why the Yankees chose to sign free agent DJ LeMahieuNew York's data suggests the second baseman is undervalued offensively1/15/2019, 9:35 PMOct 7, 2018; Denver, CO, USA; Colorado Rockies second baseman DJ LeMahieu (9) hits a double during the third inning against the Milwaukee Brewers in game three of the 2018 NLDS playoff baseball series at Coors Field. Mandatory Credit: Russell Lansford-USA TODAY Sports / Russell Lansford