In-House Option: Austin Slater
Austin Slater has shown that he is versatile, playing in the infield and outfield in the minor leagues, including a decent amount of time at first base. It would probably not be the best use of that versatility to pencil him in as the everyday first baseman, but he has proven that he could at least be serviceable in the position.
That is provided he can shake off an ugly month of September.
The 26-year-old was hitting .281/.396/.529 with 17 extra-base hits in 144 plate appearances when the calendar flipped to September. However, he went just 6-for-47 (.128 BA) with 19 strikeouts in 48 trips to the plate over the final month.
He showed some pop in the minors last year with 17 doubles and 12 home runs in 296 plate appearances before he was called up, but he doesn’t have the prototypical power-hitting first baseman profile
He is probably better served as a versatile bench player who can start all over the diamond and who can get hot with the bat, but he’s an option worth considering if the Giants trade Belt and no outside addition is made.