Mariners promoted SS prospect Colt Emerson to Triple-A Tacoma.

Emerson will wrap up the year on the doorstep of the majors after batting .281/.380/.446 with 14 homers and 13 steals across 124 games between High-A Everett and Double-A Arkansas. The precocious 20-year-old shortstop blends an above-average hit tool with growing over-the-fence power potential, which makes it easy to envision him as an impact fantasy contributor once he reaches the majors.