Miller (elbow) will make his next rehab appearance Tuesday for Triple-A Las Vegas, Martin Gallegos of MLB.com reports.
Miller could be making his final start in the minors Tuesday, as the team is considering activating him when rosters expand Sept. 1. The flamethrower is expected to toss 50 pitches or three frames in Tuesday's outing. If all goes according to plan, it wouldn't be a surprise to see Miller step back into the Oakland rotation as soon as Sunday, though he would likely be on some sort of a workload restriction if he pitches in the Athletics' series finale with the Angels.