For most of the last decade, the Giants had two marquee players who viewed themselves as two-way contributors. Madison Bumgarner successfully lobbied his way into 14 pinch-hit appearances for Bruce Bochy (he was remarkably helpful, too, reaching base in half of them), but first baseman Brandon Belt has thus far been foiled in his plans to one day take the mound.
The game is changing, though, and those conversations no longer happen just behind closed doors. Shohei Ohtani of the Angels is the most notable example, and the Giants once chased him with the very clear plan of letting him be an ace and a key part of their lineup.