Justus Sheffield allowed four earned runs on four hits in 4.2 innings in Monday's loss to the A's.
Sheffield has not been good this season. He's lost both of his starts thus far and has reached a 9.39 ERA and 1.83 WHIP. Not what the Mariners were looking for from one of their top prospects. He'll look to bounce back in his next start on Sunday against the Rockies.