Baez could get votes, but he doesn't really have enough innings compared to other full-time infielders at their respective positions. Here's his fielding breakdown:
Second base: 32 games, 236 2/3 innings, three errors, .979 fielding percentage, .831 zone rating
Third base: 50 games, 283 2/3 innings, six errors, .938 fielding percentage, .784 zone rating
Shortstop: 13 games, 105 innings, no errors, 1.000 fielding percentage, .848 zone rating
Among National League second basemen who have played at least 67 games, the Cubs' Ben Zobrist has the top fielding percentage (.994), and he's played 714 2/3 innings there.