Boxberger (abdomen) is expected to make his fifth rehab appearance with Double-A Montgomery on Wednesday night, Marc Topkin of the Tampa Bay Times reports.
The 27-year-old reliever will take his act to a new setting, and could be in line for at least one more appearance over the weekend with the Biscuits. Boxberger has generated mixed results to date in his four prior trips to the mound with High-A Charlotte and Triple-A Durham, giving up two runs over 3.2 innings, but also striking out six. If the Rays are satisfied with Wednesday's performance, there's a chance that it could be the final rehab outing for the closer before rejoining the big league club.