Diaz will sit Saturday against the Astros, Neil Solondz of the Rays Radio Network reports.
The Rays clinched a spot in the playoffs Friday and will sit a handful of starters a day later. Diaz may have been bound for the bench regardless of Friday's result, however, as that game was his first one back in the lineup after a 10-day absence due to shoulder issues. Jonathan Aranda starts at third base Saturday.