Cardinals starting pitcher Steven Matz (left) walks to the dugout with a team trainer after facing one Pittsburgh batter on May 22, 2022; Cardinals outfielder Dylan Carlson scores on a single in the second inning against Pittsburgh on May 21, 2022. (AP Photos/Gene J. Puskar)

The St. Louis Cardinals made eight roster moves Monday heading into a game that night against the Toronto Blue Jays that marks the start of a nine-game homestand.

Injuries to two starting players, pitcher Steven Matz and outfielder Dylan Carlson, were to blame for some of the moves. The Cardinals placed Matz on the 15-day injured list with a left shoulder impingement and Carlson on the 10-day IL, retroactive to May 22, with a left hamstring strain.

Matz threw only four pitches in Sunday's start at Pittsburgh before leaving the game. The left-hander is 3-3 with a 6.03 ERA in nine starts in his first season in St. Louis.

Carlson left Saturday's game after two innings. The versatile outfielder had been emerging from a slow start in recent games and is hitting .247 with two home runs and 11 RBIs this season.

The team also placed catcher Yadier Molina on the bereavement list. The night before, Molina made his first career pitching appearance, working the ninth inning of an 18-4 blowout that completed a sweep of the Pirates.

And right-hander Angel Rondón, who earned his first big league win after replacing Matz on Sunday, was optioned to Triple-A Memphis after the game.

So, that's four players not available for the opener against the Blue Jays at Busch Stadium. But four players replaced them, all summoned from Triple-A Memphis: outfielder Lars Nootbaar, left-hander Matthew Liberatore, right-hander Junior Fernández and catcher Iván Herrera.

Nootbaar, who spent a good chunk of the 2021 season with St. Louis, is coming off a game with the Redbirds on Sunday in which he swatted three home runs and drove in seven runs. Nootbaar was optioned to Memphis on April 24 after opening the season in the big leagues.

Liberatore makes a quick return to the Cardinals after making his major league debut Saturday. The highly rated 22-year-old went 4.2 innings and allowed four runs, then was optioned to Memphis after the game.

Fernández is 1-2 with a 6.25 ERA in 16 games with the Redbirds this season. He pitched in 34 games for the Cardinals from 2019-21.

Herrera, 21, is the No. 4 prospect in the Cardinals organization, according to MLB Pipeline. He has a .310 average, .405 on-base percentage, .898 OPS, two homers and 13 RBIs in 20 games with the Redbirds in 2022. His next game in the big leagues will be his first.