The Nationals activated Herz (elbow) from the 60-day injured list Monday.
Herz is set to start Monday's game against the Tigers in what will be his first appearance at the major-league level since 2024, as he's completed the long road back from April 2025 Tommy John surgery. The left-hander made 10 rehab starts, posting a 3.16 ERA and 30:7 K:BB over 25.2 innings. Herz threw 4.1 innings and 65 pitches in his last start Sept. 11, so he'll be on a relatively limited workload versus the Tigers.