The San Francisco Giants have placed left-handed reliever Tyler Matzek and infielder Thairo Estrada on waivers, making them available for claims as they seek to reshape their roster. Estrada, who was the Opening Day second baseman, has struggled offensively this season, which may influence the Giants' decision regarding his future with the team. Meanwhile, Robbie Ray has been placed on the 15-day injured list due to a hamstring strain sustained during a recent game, marking a setback for the team as they compete for a Wild Card spot. Ray, who has a 4.70 ERA in seven starts this season, is recovering from Tommy John surgery and had shown promise before the injury. The Giants have recalled right-handers Landen Roupp and Austin Warren from Triple-A to fill the gaps left by Ray and Jordan Hicks, who is also on the injured list with shoulder inflammation. These moves reflect the Giants' ongoing struggle with injuries and inconsistent player performance.