The Astros selected Henley's contract from Triple-A Sugar Land, and he's scheduled to start Monday against the Rangers, Brian McTaggart of MLB.com reports.

It remains unclear why Framber Valdez was scratched from his start Monday, but it will give Henley the chance to make his MLB debut. Henley spent last season at Double-A Corpus Christi and had a 5.06 ERA over 106.1 innings, and he allowed two earned runs with a 6:4 K:BB in five frames during his lone outing for Sugar Land this season. The 26-year-old righty doesn't have significant prospect pedigree and is facing one of the best lineups is baseball, so he shouldn't be on the streaming radar.

Bolton was placed on the 15-day injured list by the Mariners on Monday, retroactive to April 6, with a general medical issue, Ryan Divish of The Seattle Times reports.

No further details are available, but Bolton will be sidelined at least for the next couple weeks. He had allowed two runs over his first six innings with the big club this season.

Snider was placed on the 15-day injured list Monday with a left knee contusion.

Snider suffered the injury Monday against the Brewers and will now be unavailable for at least the next couple weeks. Cody Bolton (undisclosed) was also sent to the injured list, and the Mariners reinforced their bullpen by selecting the contracts of Tyson Miller and Brett de Geus.

The Mariners designated Adcock for assignment Monday.

Adcock was optioned to Triple-A Tacoma during spring training and has now been removed from the 40-man roster. The 26-year-old had a rough start to the campaign with Tacoma, having allowed two earned runs with a 2:3 K:BB over 2.1 innings.

Romano (elbow) threw a live batting practice session Sunday, Arden Zwelling of Sportsnet.ca reports.

The Blue Jays are still determining what the next steps for Romano will be, but a rehab assignment would seem imminent. Romano has been ramping things back up after being diagnosed with elbow inflammation late in spring training. There's no timetable for his return, but one should become clearer in the coming days.

The Yankees selected Maciejewski's contract from Triple-A Scranton/Wilkes-Barre on Monday.

Maciejewski split most of last season between the Double-A and Triple-A levels and had a 2.96 ERA and 50:14 in 45.2 innings over 30 total appearances. He should fill a low-leverage relief role in his first taste of the big leagues with the Yankees.

Cousins was optioned to Triple-A Scranton/Wilkes-Barre on Monday.

The Yankees selected Cousins' contract from Scranton/Wilkes-Barre last week, and he allowed one earned run with a 4:3 K:BB over three innings during his brief time in the majors. The 29-year-old could rejoin the big club later in the season as bullpen depth is needed.

Andrews was designated for assignment by the Yankees on Monday.

Andrews was acquired via trade in February but failed to make the Opening Day roster and had allowed six runs in his first 3.2 innings at Triple-A Scranton/Wilkes-Barre. Josh Maciejewski is taking his spot on the 40-man roster.

Brebbia was placed on the 15-day injured list Monday, retroactive to April 6, with a left calf strain.

The right-hander exited his appearance Friday against the Royals with calf soreness and will be out for at least the next couple weeks after being diagnosed with a strain. Jordan Leasure and Steven Wilson could see more high-leverage spots in front of closer Michael Kopech while Brebbia is sidelined.

Richards walked two and struck out two in a scoreless inning of relief during Sunday's loss to the Yankees.

The 30-year-old right-hander has come up big for the Blue Jays bullpen in the early going while Jordan Romano (elbow) and Erik Swanson (forearm) have been on the shelf. Richards has appeared in six of Toronto's first 10 games, posting a 0.00 ERA and 8:3 K:BB over 5.2 innings while giving up only two hits -- although he did allow an inherited runner to score on a wild pitch Sunday. He hasn't seen a lot of high-leverage usage and only has one hold so far, but Richards' ability to work longer outings and collect bulk strikeouts with solid ratios gives him some fantasy value in deep AL-only formats.