Athletics make it a roster shuffle before Tigers visit, calling up Ornelas

Ahead of Friday’s series opener at Sutter Health Park against the Tigers, the Athletics made a series of roster moves that tightened their short-term flexibility and refreshed the infield looks available in Oakland. The club’s main transaction was a call-up from Triple-A Las Vegas, elevating infielder Jonathan Ornelas to join the A’s big-league roster.

Ornelas’ promotion follows a Minor League deal that he signed with Oakland last week, putting him on the path to a quick opportunity once the club decided it needed more infield depth for the stretch. Triple-A Las Vegas has been his immediate base of work, and the move suggests the A’s were looking for a live bat/defensive option who could be slotted into day-to-day game plans rather than waiting for a longer runway to develop.

Along with the call-up, Oakland optioned Colby Thomas, moving him back to the minors. In roster terms, that trade of spots is a common rhythm for clubs that want to keep major-league at-bats and innings aligned with matchups and late-season urgency, while also preserving the overall depth chart in case injuries or off-days create sudden needs.

The Athletics also designated Zhuang for assignment as part of the same flurry. A DFA clears roster space while the club evaluates what to do next, which can include trading the player, releasing him, or, depending on the player’s contractual status and waiver outcomes, having him remain within the organization through a different roster mechanism. For now, the designation marks this as a reset point in the club’s active roster composition rather than a routine demotion.

The timing matters because it comes right before a weekend series with Detroit, a matchup that typically puts a premium on lineup agility, in-game adjustments, and having enough infield answers for late innings. With both teams preparing for the demands of a series, Oakland’s sequence of moves indicates it wants the option to rotate personnel without losing overall structural stability, especially in the infield where double-play possibilities and late defensive substitutions can swing a game.

What to watch next is how Ornelas is used once he is on the roster, and whether Oakland makes further changes after the opening contest. Because the A’s DFA move can carry waiver-related developments, the next headline could clarify whether Zhuang stays in the organization immediately, winds up moving elsewhere, or returns via another roster path. For fans, the simplest takeaway is that Oakland is actively managing its roster in the immediate term, and these moves are designed to give it more in-game choices as the series begins.