Beck (arm) will throw three innings in his rehab appearance with Triple-A Sacramento on Tuesday, Alex Pavlovic of NBC Sports Bay Area reports.
Beck continues to work his way back from surgery on March 3 to address an upper right arm aneurysm. He made his first rehab outing Thursday, when he allowed one run on four hits while striking out four across three innings. If Beck does end up returning to the majors this season, he'll likely work out of the Giants' bullpen rather than the starting rotation.