Pro #1: The potential return
The Giants would be plenty happy to get something out of Samardzija before his time with the team is over. He has been serviceable during his time in San Francisco, but $90 million over the course of five years is a lot of money.
For comparison’s sake, Madison Bumgarner just signed a five-year, $85 million contract.
Regardless, the team should try to get something out of him while they still can.
It is difficult to say what kind of trade package the Giants would get in return for the Shark. Certainly not a top prospect, but perhaps a mid-level prospect or even a current big league player would be in order.
The Giants have their fair share of needs to fill, so any young players they can get to aid in their rebuild would be a welcome sight.
Keep in mind, the Giants were able to get Mauricio Dubon out of the Drew Pomeranz trade, so perhaps Samardzija could net something similar. A young center fielder or a controllable starting pitcher who could be in the rotation for years to come would be ideal.