De Jong has appeared in the majors in parts of four seasons. Most recently in 2020, the 27-year-old appeared in three games (two starts) with the Houston Astros. He totaled 7.1 innings (14.73 ERA). In 54.1 career innings pitched, De Jong has a 7.12 ERA (-0.2 fWAR).
Via Fangraphs, De Jong features a four-pitch mix including a fastball, slider, curveball, and changeup. Last year, his fastball averaged 93 mph. For his career though, the heater has averaged closer to the 90 mph mark. Moving forward, it will be interesting to see if he continues to add velocity or revert to the mean.