Mariners' Isaiah Campbell: Optioned to Double-A

Campbell was optioned to Double-A Arkansas on Friday, Corey Brock of The Athletic reports.

Campbell recorded a 1.57 ERA and 0.93 WHIP over 46 innings between High-A and Double-A ball last season. He possesses elite strikeout stuff (10.9 career K/9) and could break into Triple-A before the end of the season.