The St. Louis Cardinals placed catcher Ivan Herrera on the 10-day injured list Monday with left knee inflammation.

Herrera, 24, sustained the injury while running the bases during the first game of Sunday's doubleheader against the Boston Red Sox.

Herrera was off to a hot start in his fourth season with St. Louis, batting .381 with four home runs, 11 RBIs and a league-leading 1.048 slugging percentage through seven games.

Pedro Pages will serve as the primary backstop in Herrera's absence. Pages, 26, is hitting .316 with one homer and six RBIs in seven games this season.

The Cardinals called up catcher Yohel Pozo from Triple-A Memphis and transferred left-hander Zack Thompson to the 60-day injured list in corresponding moves.