Buster Posey is the starting catcher for the San Francisco Giants.
This is something that you already know. You also know that he will remain in said position until forever. Which is a happy thing. But what we as Giants fans don't know is who will be playing the other positions around Posey for the rest of eternity.
First base has become sort of a retirement community for players who can no longer play their original position. Sure, there's less mobility required, and I'm not saying that first base is by any means easier than other positions, but if you look at the trends, a lot of people playing first base are former-something elses.
Nick Swisher (outfield) has played first base. Albert Pujols went all the way around the infield before settling in as a first baseman. In fact, seven players were the opening day starters at first base after playing at least 100 games at another position earlier in their career. Pujols, Swisher, Mike Napoli (C), Kevin Youkilis (3B), Brandon Moss (OF), Edwin Encarnacion (3B) and Alex Gonzalez (SS) all started the year there. The Giants ran into Yuniesky Betancourt (SS) in Milwaukee, who realized he was a first baseman and hit thirty homers in that series.
The Giants are no exception to that rule (see: Pedro Feliz). And again, if you surmise that Posey will eventually move to first base somewhere before 2022, then you have to wonder about what else is in the long-term plans for San Francisco.