WHO HE IS
A 22-year-old OF prospect acquired by the Mariners from the Rays in a six-player trade last Thursday, the first notable move of baseball's off-season.
WHO HE ISN'T
A relative of Boog Powell, the 1970 AL MVP and a four-time All-Star for the Orioles.
Herschel Mack Powell IV. Got his nickname from his grandfather, who was a fan of the other Boog.
Named MVP of the 2014 Midwest League All-Star Game; has hit .308 in four minor league seasons.
Served a 50-game ban after testing positive for an amphetamine in 2014; subpar defense and limited power (only six career HRs).
Powell, who reached Triple A in 2015, should make his MLB debut next season.
BRACE HEMMELGARN/MINNESOTA TWINS/GETTY IMAGES (POWELL)