An MRI on Friday revealed a Grade 2 strain in Herrera's left hamstring, John Denton of MLB.com reports.

Herrera told reporters Friday that he is expected to miss 2-to-6 weeks due to the strain. He was warned by medical staff that attempting to play through the strain could result to a season-ending injury, so the decision was made to shut him down and place him on the 10-day injured list. The Cardinals should have a better sense of when Herrera can return once he resumes baseball activities, but the severity of the injury could keep the 25-year-old sidelined through the All-Star break. With Herrera sidelined, Yohel Pozo will serve as the primary backup catcher behind Pedro Pages, while Alec Burleson, Nolan Gorman, Thomas Saggese and Willson Contreras are candidates to see increased work at designated hitter.

Santander (shoulder) has yet to resume hitting, Keegan Matheson of MLB.com reports.

Santander has been on the shelf since late May due to inflammation in his left shoulder. While he's been cleared to throw, he hasn't begun hitting yet. Considering the lengthy layoff, it's likely Santander will need a rehab assignment. If that's the case, Santander shouldn't be expected back until July.

O'Hearn is out of the lineup for Friday's game against the Yankees.

O'Hearn missed a game last weekend due to a left ankle injury, but he's started four straight contests since, going 2-for-13 (.154) at the plate. He'll yield to Coby Mayo at first base while Adley Rutschman plays DH.

The Cardinals placed Herrera on the 10-day injured list with a left hamstring strain Friday.

It's a tough blow for the St. Louis lineup, as Herrera had cemented himself as the team's top power bat in the heart of the order. Herrera is slashing .320/.392/.533 with eight home runs, 36 RBI, 22 runs scored, one stolen base and a 16:32 BB:K across 171 plate appearances. This will be his second trip to the injured list this season after missing time with a knee injury earlier in the year. Pedro Pages and Yohel Pozo will handle catching duties for the Cardinals, while Nolan Gorman and prospect Thomas Saggese, who was promoted in a corresponding move Friday, should fill the hole left by Herrera.

Flores went 1-for-1 with a two-RBI double during Thursday's 2-1 win over the Guardians.

Flores pinch hit in the seventh inning and delivered what proved to be the game-winning hit. The 33-year-old has been left out of the starting lineup in two of the club's last three games following Rafael Devers' arrival. However, Devers is expected to eventually see time at first base, which would lead to Flores getting more opportunities at designated hitter. Over 16 outings in June, Flores is slashing .269/.371/.385 with seven RBI, seven runs scored, three doubles and one home run across 62 plate appearances.

Polanco is absent from the lineup for Friday's game against the Cubs.

It's a routine day off for Polanco, who had started each of the previous 13 contests. The Mariners will go with Mitch Garver at designated hitter and Cole Young at second base in Friday's series opener.

Trout went 2-for-4 with a solo home run in Thursday's 7-3 loss to the Angels.

Trout opened the scoring in the first inning with a two-out, 423-foot blast off Carlos Rodon, his 12th homer of the year. The 33-year-old Trout has hits in seven of his last eight contests, going 10-for-29 (.345) with a 1.009 OPS in that span. He's slashing .236/.323/.466 with 22 runs scored, 12 RBI and a pair of stolen bases across 201 plate appearances this season.

Grichuk started in right field and went 0-for-2 with a walk and an RBI in Thursday's 9-5 win over the Blue Jays.

Grichuk got a rare start against a right-hander while filling in for the injured Corbin Carroll (hand). Regardless of Carroll's status for Friday's game against Colorado, Grichuk will likely start against Rockies left-hander Austin Gomber. Grichuk's having a rough June, going 2-for-20 with three walks and one RBI over nine games.

Schwarber went 1-for-3 with a solo home run and a walk in Thursday's 2-1 win over Miami.

Schwarber cracked homer No. 23 for the season and his fourth of the month of June so far. The veteran slugger has seen his average dip a bit -- he's now hitting .241 this year after batting .262 as of May 17 -- but that hasn't impeded his power production very much. Over his last 136 plate appearances (31 games), Schwarber is slashing .211/.338/.474 with eight long balls, six doubles and 20 RBI to go with 20 runs scored.

McCutchen went 4-for-8 with a double, a solo homer and a second run scored in Thursday's doubleheader split with Detroit.

McCutchen extended Pittsburgh's lead to 4-0 in the nightcap with his eighth homer of the year and third in seven games, a 382-foot blast off Keider Montero in the third inning. McCutchen now has at least one hit in 10 of his last 11 games, going 16-for-44 (.364) with seven extra-base hits in that span. Overall, the veteran outfielder is slashing .271/.355/.432 with 28 RBI and 24 runs scored through 263 plate appearances this season.