San Francisco Giants: Potential replacements if Madison Bumgarner walks

Young in-house options
This isn’t the flashiest option, especially considering this year’s call-ups have not exactly set the league on fire, but it’s still an option worth exploring.
Rookies Tyler Beede (82.2 IP, 5.77 ERA) and Shaun Anderson (82.2 IP, 5.33 ERA) have both held down rotation spots for much of the year. They’ve also taken a look at Conner Menez (3 GS, 7.11 ERA), who has been dominant in the upper levels of the minors.
Last year’s standout rookie Dereck Rodriguez (64.1 IP, 5.32 ERA) has spent a good portion of the year at Triple-A trying to regain the form he showed last season, and he will presumably be in the mix for a rotation spot again next spring.
While all of those pitchers have potential, none of them have proven to be a reliable option every fifth day, so it’s hard to know what to expect from them going forward.
There are also a few up-and-comers who have yet to make their MLB debuts that could be a factor next year.
Right-hander Logan Webb, who checks in as the team’s No. 5 prospect at MLB.com, was recently promoted to Triple-A Sacramento. Likewise, towering 6’11” right-hander Sean Hjelle, who is the team’s No. 6 prospect, was bumped up to Double-A.
Both could conceivably debut at some point in 2020, providing an in-house boost in the process.