Will have to be that or someone called up for an emergency start, which would probably turn into a bullpen day with whoever isn’t used tonight filling the middle innings.
Who did they drop after the doubleheader?
If that Strzelecki guy is still on the active roster that would be my guess.
With Small sent back to Nashville it looks like the plan will be to use Houser, Burnes, Ashby, and Lauer against the Padres heading into the Monday off day. If Woodruff can get off the IL with a minimum stay they might not need a sixth starter for a while.