Belt joined the National League All-Star squad last year thanks to the Esurance MLB All-Star Game Final Vote, which always prompts plenty of fan interest.
Left fielder Jarrett Parker and center fielder Denard Span round out the Giants' representation on the ballot.
Fans may cast votes for starters at MLB.com and all 30 club sites -- on computers, tablets and smartphones -- exclusively online using the 2017 Esurance MLB All-Star Game Ballot until Thursday, June 29, at 11:59 p.m. ET. On smartphones and tablets, fans can also access the ballot via the MLB.