SEATTLE, WA - SEPTEMBER 05: Justus Sheffield of the Seattle Mariners warms up in the bullpen. (Photo by Lindsey Wasson/Getty Images)
What did Justus Sheffield of the Seattle Mariners change this season?
Justus Sheffield made huge statistical improvements this season. In 2019, he posted a 5.50 ERA and dropped it down to 3.58 this past season. Sheffield also decreased his walk rate and WHIP, which were red flags in 2019.
So, what changes did Sheffield make? First, let’s analyze Justus’ numbers prior to 2020.
Justus Sheffield 1.0
When Justus was the 31st ranked MLB prospect in 2018, scouts were raving about his 92-97mph 4-seam fastball and great slider from the left side.