Mountcastle (shoulder) took batting practice on the field Tuesday and is likely a couple days away from being reinstated from the 10-day injured list, Cordell Woodland of 105.7 The Fan Baltimore reports.

The 26-year-old will be eligible to be activated Wednesday, but the Orioles may give it an extra day or two before returning him to the active roster. Regardless, Mountcastle should be ready for game action before the end of the regular season Sunday.

Diaz (hamstring) is out of the lineup for Tuesday's game against the Red Sox, Marc Topkin of the Tampa Bay Times reports.

Diaz departed Sunday's matchup versus the Blue Jays with right hamstring tightness and will be out of the starting nine for at least one game. Tampa Bay has a scheduled day off Thursday, which could prompt the club to sit the 32-year-old again Wednesday in order to provide a couple extra days of rest.

Horwitz was optioned to the Blue Jays' Florida Complex League affiliate on Tuesday, Ben Nicholson-Smith of Sportsnet.ca reports.

Triple-A Buffalo's season is over, which is the reasoning behind Horwitz being sent to the Jays' FCL club. He's clearing out to make room for Brandon Belt's return from the injured list.

Lowe went 1-for-4 with a solo home run against the Angels on Monday in a 5-1 win.

After Adolis Garcia and Mitch Garver hit consecutive solo homers in the sixth inning, Lowe made it three straight with his own blast to right field. The long ball was just his second over a 34-game stretch dating back to Aug. 19. Lowe has shown less power with 17 homers this season after slugging a career-high 27 last year, but he's improved his RBI count from 76 to 81 thanks largely to hitting in a much more potent Rangers offense.

Schanuel was pulled in the seventh inning of Monday's game against the Rangers due to tightness in his knee, Sarah Valenzuela of the Los Angeles Times reports.

Schanuel fouled a ball off his knee earlier in the contest and was initially able to remain in the game, but manager Phil Nevin noted Schanuel's knee began to tighten up later on, resulting in his removal. Schanuel will be considered day-to-day going forward, and the team plans to evaluate him further Tuesday, per Valenzuela.

Torkelson went 2-for-4 with a double and two RBI in Sunday's 2-0 win over the Athletics.

In his first multi-hit game since Sept. 15, Torkelson delivered his 33rd double of the season, though it was his third-inning single that drove in the only two runs of the contest. The 24-year-old has had a nice sophomore campaign, as he's now up to 88 RBI across 153 games. He's collected 19 of those RBI in 21 games this month.

Guerrero went 2-for-5 with two homers in Sunday's win over the Rays.

Guerrero looks to be back on track after going 1-for-13 in his previous five games. He smacked three homers in three games prior to that. The 24-year-old Guerrero is up to 26 homers and 94 RBI on the year while batting .266 with a .793 OPS through 660 plate appearances.

Diaz was diagnosed with right hamstring tightness after leaving Sunday's game against the Blue Jays, Tricia Whitaker of Bally Sports Sun reports.

The 32-year-old went 1-for-2 with a run scored before he exited Sunday's contest with the injury. It's unclear if Diaz will require an MRI at this point, and he should be considered day-to-day heading into Tuesday's series opener at Boston.

Diaz was removed from Sunday's game against the Blue Jays with an apparent leg injury, Marc Topkin of the Tampa Bay Times reports.

The 32-year-old went 1-for-2 with a run scored before being lifted with the apparent injury. The Rays have a team day off Monday, so Diaz will have some time to rest up before Tuesday's series opener in Boston.

Walsh is not in the lineup for Sunday's game against Twins, Rhett Bollinger of MLB.com reports.

Walsh started the Angels' previous seven games but will head to the bench Sunday after he posted a .549 OPS during that stretch. Jo Adell will take over in right field Sunday, batting sixth.