Ian Krol is a 26-year-old left-handed pitcher who has already pitched in the A’s, Nationals, Tigers and Braves organization. He had a breakout season in 2016. Krol appeared in 63 games for the Braves, while maintaining a 3.18 ERA and averaging 9.88 K/9.
Krol fell back down to earth in 2017. He appeared in 51 games with a 5.33 ERA and his K/9 dropped to just over 8.1. Krol also missed time with an oblique injury in 2017. So why should the Mariners be interested in a mediocre bullpen arm? Upside. Pure upside.
Krol has a unique ability to get ground ball outs.