Holl scored a goal in Tuesday's 4-2 loss to the Hurricanes.
Holl checked into the lineup following his Monday call-up from AHL Hershey. The 34-year-old scored in his season debut while logging 12:05 of ice time. Holl had just two points in nine appearances for the Blues in 2025-26, and he has minimal scoring upside. He'll compete with Dylan McIlrath for time in the lineup while the Capitals await the return of Matt Roy (lower body).