Now 25 years old, De Los Santos joined the Phillies before 2018 in a trade that sent infielder Freddy Galvis from Philadelphia to San Diego. De Los Santos was a noteworthy prospect in his younger days, topping out as Baseball America’s sixth-best farmhand in the Philly organization in 2019.
Since a promising showing with the Phillies’ Triple-A team in 2018, De Los Santos’ production has taken a negative turn. Across 30 major league innings from 2018-19, De Los Santos put up a bloated 5.70 ERA with a 19.6 percent strikeout rate and a walk percentage of 10.2. He also threw 94 frames of 4.40 ERA ball with similar strikeout and walk rates during the 2019 Triple-A campaign.
With no minor league season in 2020, De Los Santos’ only hope of getting into a real game was to crack the Phillies’ bullpen. He was unable to do that at any point, though, and the team removed him from its 40-man roster in August.