Ross started both games this series in which Jon Lester pitched because of the successful way they worked together in Lester's recent starts. But with Clay Buchholz on the mound against Max Scherzer on Saturday, Saltalamacchia was the choice.
Saltalamacchia has hit .333 off Scherzer in his career and is hitting .273 with five RBIs off him this postseason.
"The biggest thing is just hitting their mistakes," Saltalamacchia said. "When they make mistakes over the plate, we can't let them get away with it."
Ross had a big night on Thursday, going 2-for-3 with a double while being involved in a pair of home-plate collisions, one of them knocking Tigers catcher Alex Avila out of the game.
Ross is 3-for-9 this postseason, his fifth as a Major Leaguer.