The Nationals transferred Waldron (chest) to the 60-day injured list Saturday.
Waldron landed on the injured list Tuesday with chest inflammation, so his move to the 60-day IL will officially rule him out for the rest of the season. He'll close the book on the 2026 campaign after accumulating a 6.54 ERA and 1.59 WHIP with a 33:11 K:BB across 42.2 innings between San Diego, Toronto and Washington. Chase Hampton was claimed off waivers from the Yankees to fill the open spot on the 40-man roster.