Utility man Jace Peterson will make his first Orioles start at third base Thursday and his first overall at the position since Aug. 31, 2017, with the Atlanta Braves against the Chicago Cubs. … Showalter said he hasn't decided on the first-game starter in Saturday's doubleheader against the Tampa Bay Rays, saying that a lot will depend on how the Orioles use their bullpen Thursday. "There's a lot of moving variables right now," Showalter said. Alex Cobb will start the second game. … The Orioles still plan on bringing up a 26th player for Saturday's doubleheader, likely a pitcher. That player must remain with the team for both games, but the team can also option a player between games to create roster space for the second game.