11:48am: The Orioles have officially announced the return of both Eflin and Mayo, and have placed Urias on the 10-day IL with a right ankle sprain. Additionally, the club selected the contract of catcher David Banuelos from Triple-A and designated outfielder Forrest Wall for assignment to make room for him on the 40-man roster. Banuelos has spent most of the season at Triple-A after being outrighted to the minors back in April, while Wall was claimed off waivers from the Marlins just a few days ago but will now return to the waiver wire.
7:38am: Rosters expand from 26 to 28 today, meaning every team in baseball will get to call up an additional pitcher and an additional hitter as they begin play today. There’s little mystery about who those players will be for the Orioles, as manager Brandon Hyde told reporters (including Brandon Weyrich of the Baltimore Sun) that right-hander Zach Eflin will be activated from the 15-day Injured List to start today’s game against the Rockies this afternoon. Earlier in the day, Weyrich reported that top infield prospect Coby Mayo was poised to join the club as their additional hitter when rosters expanded today.
It will be the second taste of big league action for Mayo, 22. The youngster got his feet wet in the majors earlier this month with a brief cup of coffee that lasted only seven games and 20 at-bats, and he hit just .059 without an extra-base hit in that brief stint at the big league level before being optioned back to the minors. His sensational .293/.369/.574 slash line at the Triple-A level this season has left him with nothing more to prove in the minor leagues, however, so Mayo now figures to get a more extended opportunity to prove himself in the big leagues as fellow rookie Jackson Holliday has. Holliday struggled badly in his first ten games in the majors back in April but has looked better since returning to the majors the day after the trade deadline with a .218/.275/.426 slash line that’s good for a roughly league average 98 wRC+.
As for Eflin, the veteran right-hander came over to Baltimore in a trade with the Rays prior to the deadline. After posting strong enough numbers last year to finish sixth in the AL Cy Young award race, the right-hander took a step back with Tampa last year, posting a pedestrian 4.09 ERA in 19 starts despite a solid 3.68 FIP. Things changed when Eflin got to Baltimore, however, and in four starts after the swap the righty looked nothing short of excellent with a 2.13 ERA and a 24.5% strikeout rate in 25 2/3 innings of work. Eflin has been sidelined in recent weeks by a bout of shoulder inflammation, but it seems now he’s healthy enough to return to action. The Orioles are surely counting on the righty to help keep afloat a beleaguered rotation that also lost Grayson Rodriguez to the injured list in the month of August.
While Mayo and Eflin were both expected to be the club’s extra players following roster expansion, it’s possible after last night’s game that two more spots on the roster could open up today as both right-hander Dean Kremer and infielder Ramon Urias exited due to injuries yesterday. Kremer was struck by a comebacker in the fourth inning yesterday and exited with a right forearm contusion, with Manny Randhawa of MLB.com among those to relay the news that Kremer’s initial x-rays came back negative. As noted by Danielle Allentuck of the Baltimore Banner, both he and Urias, who who suffered a sprained ankle after also narrowly avoiding injury when struck in the face by a pitch earlier in the game, figure to be evaluated further today to see if either player will require a stint on the injured list.
The planned returns of Eflin and Mayo to the roster coincidentally figure to cover for the losses of Kremer in the rotation and Urias at third base in the short term, but if either player requires a stint on the injured list the team will likely need to deep into its depth in order to fill out the roster. Deadline addition Trevor Rogers is on the 40-man roster and could return to the rotation is Kremer misses time, though he was optioned after posting a disastrous 7.11 ERA in his first four starts as an Oriole. On the positional side, meanwhile, non-roster veterans like J.D. Davis or Jean Segura could provide infield depth for the club if Urias ends up going on the shelf.