Tolman was charged with a blown save after allowing one run on three hits while striking out one over one-third of an inning in Saturday's 8-5 extra-innings win over the Cardinals.
Alvarez didn't factor into the decision Saturday against the Cardinals after allowing five hits and a walk while striking out eight over six scoreless innings.
Cavalli (13-5) earned the win Friday against the Cardinals after allowing four hits while striking out six over five scoreless innings.
Ruiz is not in the lineup for Friday's game in St. Louis.
Ortiz is absent from the lineup for Friday's game in St. Louis.
The Nationals signed Cavalli to a four-year contract extension Friday with a club option for 2031.
The Orioles recalled Povich from Triple-A Norfolk on Friday.
The Nationals activated Gray (elbow) from the 60-day injured list Thursday, Kyle Williams of TheBanner.com reports.
Bradfield will be held out of the lineup at Triple-A Norfolk on Thursday due to right adductor tightness, Matt Weyrich of The Baltimore Sun reports.
Povich will rejoin the Orioles this weekend and is likely to make a start against the Brewers, Matt Weyrich of The Baltimore Sun reports.
