McDonald returned Tuesday for St. Louis.
McDonald missed Sunday's game with the flu.
McDonald had a goal and an assist, and Brian Elliott stepped in and made 19 saves, and the Blues snapped a three-game losing streak by beating the Minnesota Wild 4-1 on Monday night.
McDonald had one goal in his previous 20 games.
McDonald returned Tuesday for the Blues.
McDonald had a lower-body injury.
McDonald played Thursday despite a lower-body injury.
McDonald has two goals and five points in seven games.
McDonald scored his first goal of the season and added an assist in the Blues' 4-3 shootout win over Nashville on Monday.
McDonald had an assist in the team's season-opening victory on Saturday.