Mountcastle (shoulder) will sit for the third straight game Saturday against the Rays, Roch Kubatko of MASNSports.com reports.

EDGE Analysis

An MRI showed no damage to Mountcastle's shoulder Thursday, but he'll nonetheless continue to rest and heal. Ryan O'Hearn will get another start at first base.

Mountcastle (shoulder) is out of the lineup again Friday against the Rays.

EDGE Analysis

Imaging scans taken Thursday on Mountcastle's left shoulder revealed no structural damage, but he'll grab a second straight day of rest and treatment as Ryan O'Hearn handles first base. Heston Kjerstad is serving as the Orioles' designated hitter.

Medical imaging on Mountcastle's left shoulder revealed no damage Thursday, Steve Melewski of MASNSports.com reports.

EDGE Analysis

Manager Brandon Hyde added that Mountcastle won't require a trip to the injured list and may even be available off the bench Thursday against the Rays. The 26-year-old first baseman is slashing just .194/.324/.194 across 37 plate appearances since the beginning of September.

Mountcastle (shoulder) is out of the lineup Thursday against the Rays.

EDGE Analysis

Mountcastle exited Wednesday's 1-0 loss to the Cardinals after feeling his left shoulder pop during a swing in the first inning. He's slated to get an MRI later Thursday, at which time more details about the severity of his injury should be available. The Orioles called up outfielder Heston Kjerstad from Triple-A Norfolk to give the team an extra healthy bat in the short term.

Mountcastle was pulled from Wednesday's game against St. Louis due to left shoulder discomfort, Rich Dubroff of BaltimoreBaseball.com reports.

EDGE Analysis

Mountcastle was able to remain in Wednesday's game for two innings after feeling his shoulder pop in the first inning. He will undergo imaging Thursday, per Roch Kubatko of MASNSports.com, and he is officially listed as day-to-day for now.

Mountcastle was removed from Wednesday's game against the Cardinals with an apparent shoulder injury, Nathan Ruiz of The Baltimore Sun reports.

EDGE Analysis

Mountcastle seemed to tweak his left shoulder during the first inning of Wednesday's game, but he remained in the game for two more innings before being pinch hit for by Ramon Urias. The Orioles should provide more information on Mountcastle's injury in the near future, but the fact he was able to play through it for a while is a good sign that the damage likely isn't too severe.

Mountcastle is not in Tuesday's lineup against the Cardinals.

EDGE Analysis

He will sit for the second time in three games. Mountcastle is hitting .194 with zero extra-base hits in eight games this month. Adley Rutschman is starting at designated hitter while James McCann starts behind the dish.

Mountcastle is out of the lineup Sunday against the Red Sox.

EDGE Analysis

Ryan O'Hearn will play first base and bat cleanup versus the Red Sox and right-hander Brayan Bello. Mountcastle went 0-for-11 with four strikeouts across the first two games of the Orioles' three-game weekend series in Boston.

Mountcastle went 3-for-5 with one RBI in Tuesday's 5-4 extra-inning win over the Angels.

EDGE Analysis

This was Mountcastle's second multi-hit effort in a row after he snapped a brief 0-for-7 skid. The first baseman hit .360 in August and continues to receive regular playing time between first base and designated hitter. For the year, he's at a strong .278/.330/.471 slash line with 18 home runs, 67 RBI, 60 runs scored and three stolen bases over 105 contests.

Mountcastle isn't in the Orioles' lineup Saturday against the Diamondbacks, Jacob Calvin Meyer of The Baltimore Sun reports.

EDGE Analysis

Mountcastle gets a day off after going 8-for-22 with a homer, four RBI and two runs scored in his last six games. Adley Rutschman will serve as the Orioles' DH while James McCann starts behind the dish.