Sanchez is scheduled to begin an injury rehab assignment with Class A San Jose. The three-time All-Star hasn't played since last June.
Sanchez injured himself last season while diving for a grounder up the middle, and he underwent surgery last August to correct the problem. Now, the Giants are hoping that Sanchez can prove he's healthy over the next few weeks before they activate him from the disabled list.
"He actually starts [Monday]," said Giants manager Bruce Bochy. "We're probably looking at closer to 20 days. But again, he'll dictate when we bring him up here [and] when we think he's ready. Hopefully it all goes well, no hiccups with his rehab. We have him mapped out for 18 days."
Emmanuel Burriss and Ryan Theriot have split time at second base with Sanchez on the shelf, and Bochy said the Giants want to make sure the 34-year-old can handle the position.
"We need to make sure he's able to throw the ball and turn two," he said. "But he needs at-bats too."