Sandoval (biceps/elbow) will begin a rehab assignment this weekend, Gabrielle Starr of the Boston Herald reports.
The left-hander made a pair of rehab appearances in April while working his back from the internal brace procedure he underwent on his elbow in 2024, but a biceps issue forced him to shut down his throwing program for a bit. Sandoval has since ramped things back up and has now been cleared for game action. The 29-year-old will likely require a handful of starts in the minors before gaining full clearance.