The Giants placed Matzek (elbow) on waivers Wednesday, Susan Slusser of the San Francisco Chroniclereports.
Matzek has been on the shelf since early May due to elbow inflammation, and he's given up three earned runs over 4.2 innings with Triple-A Sacramento since beginning a rehab assignment Aug. 13. He's trending toward a return from the 60-day injured list sometime in September and can now be picked up by another team that is willing to pay the remainder of his salary for the season. If he passes through waivers unclaimed, the 33-year-old southpaw will remain with the Giants.