Wieters went 2-for-4 with a pair of RBI singles in a win over the Brewers on Wednesday.
Wieters went 1-for-3 with three RBI and a stolen base in Thursday's win over the Dodgers.
Wieters will start at catcher and hit eighth Thursday against the Dodgers, Jenifer Langosch of MLB.com reports.
Manager Mike Shildt announced Friday that Wieters will be added to the 40-man roster and will serve as the Cardinals' backup catcher, Mark Saxon of The Athletic reports.