Swanson will serve as the opener for the second game of Wednesday's doubleheader against the Nationals, Ryan Divish of The Seattle Times reports.

EDGE Analysis

Swanson hasn't pitched since being activated from the paternity list Monday, but he'll begin Wednesday's nightcap on the mound ahead of primary pitcher Tommy Milone. Over his last 10 appearances, Swanson has posted an 11:4 K:BB and 1.04 WHIP in 8.2 scoreless innings.