What to expect from DJ Herz’s return to the Washington Nationals

However, things have not gone according to plan since then. After showing diminished stuff in Spring Training, it turned out that Herz needed Tommy John Surgery. He missed all of the 2025 season and was on the sidelines to start 2026. Following three rehab starts in June, Herz had to hit the shelf again due to a flexor strain. After building back up, Herz is back and will make his return to the big leagues tonight against the Tigers.

This is a start that I am really looking forward to. Despite posting a 4.16 ERA in 88.2 innings as a rookie, his underlying numbers were much more promising. Herz posted a 3.71 FIP, a 3.85 xFIP and 3.30 xERA. The lefty was also a strikeout machine back in 2024.

Herz's bread and butter is his fastball/changeup combination. As a prospect, he was known for his changeup but his fastball really stood out in the big leagues. It does not have crazy velocity, but the pitch generated a 30.5% whiff rate due to shape and deception. Against righties, Herz paired the heater with a nasty changeup. When he faces lefties, he relies more on his slider.