PEORIA, Ariz. — The reactions from Manny Acta said everything. The Mariners’ 56-year-old bench coach threw dozens of pitches to three of the Mariners’ most promising prospects during batting practice Thursday afternoon on Field 2 of the Peoria Sports Complex. Two swings, in particular, stood out. Colt Emerson, the sweet-swinging 19-year-old shortstop, began one round by […]