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A's Promote Top Lefty Prospect Gage Jump to Major League Roster

Oakland replaces Aaron Civale on the injured list with a high‑strikeout lefty who is scheduled to debut against the Mariners.

Overview

  • The Athletics promoted 23‑year‑old Gage Jump on Tuesday to fill the rotation spot opened when veteran Aaron Civale was placed on the 15‑day injured list with a right shoulder/lat issue.
  • Jump earned the call after back‑to‑back dominant Triple‑A starts that included a seven‑shutout‑inning outing and a Pacific Coast League Pitcher of the Week honor.
  • At Triple‑A Las Vegas this season Jump has struck out 56 batters in 38 innings and averaged a mid‑90s fastball that can touch 99 mph while using a low arm slot and a four‑pitch mix to generate swings and misses.
  • Concerns remain: Jump missed 2023 for Tommy John surgery and has a high walk rate (about 20 walks in 38 innings), which fuels questions about his long‑term durability and whether he will stick as a starter or move to the bullpen.
  • The promotion fits the A’s youth‑first roster strategy and immediately changes the rotation picture, with the club and fans watching whether Jump can convert his Triple‑A strikeout ability into consistent big‑league command.