The San Francisco Giants have a number of aging players that they would probably like to trade. They have a number of younger players who are probably untouchable, too.
With the team in rebuild mode, they are trying to get younger but they still have an aging corps of veterans who are eating up the team's budget and getting in the way of a rebuild.
This is a pretty difficult conundrum that the Giants have had to deal with for some time now. The 2010s were filled with championships and the team dealt away prospects while trying to contend.