One more 25th man option goes out the window.

Free-agent infielder Rich Aurilia will return to the Giants on a minor-league contract, according to a major-league source.

Aurilia, 37, chose the Giants over the Cubs and Phillies. His deal is expected to be finalized on Monday.

At present, the Cubs would be set to go with Aaron Miles as the primary back-up at third base, and some combination of Miles and Mike Fontenot backing up shortstop.