Wilson Betemit, who has been on a rehab assignment with Double-A Bowie, was also activated on Saturday.
"We think they can all bring something," manager Buck Showalter said Friday. "You love having a third catcher. It makes it easier to [use] Matt [Wieters as the designated hitter] and it makes it easier to run for him. Xavier brings a guy who can pinch-run, and Tolly has been a big part of some of our wins this year. Talking to [manager Ron Johnson] down in Triple-A, they were the guys that he strongly recommended, with some others."
Showalter said Tommy Hunter will throw an inning for Bowie on Saturday and he is eligible to return to the team early next week as a callup. Bowie is in the playoffs -- unlike Norfolk -- so Hunter won't be available to the Orioles right away.
Zach Britton, on the other hand, will. Britton -- optioned after Thursday's start -- is tentatively slated to make his next start with the Orioles on Tuesday with Joe Saunders starting Monday's opener in Toronto. Chris Tillman will pitch Sunday's game against the Yankees. Showalter said they are considering "one or two" players additionally from Norfolk, and that probably means Jake Arrieta and left-handed pitcher Zach Phillips, who is not on the 40-man roster. Norfolk's season ends Monday.
"The game we play up here changes dramatically tomorrow," Showalter said. "The good news is that everybody we have coming here has already been here. We still have got, I think, one non-roster player we're considering. We'll see how the next day or two goes."