Dickerson and Souza are both off to particularly good starts, as is Tim Beckham, who has played shortstop in Duffy's absence. However, Beckham is not on the ballot. Also of note, Rasmus and Duffy have not yet played this season, but both are expected to return in the coming weeks.
Rays closer Alex Colome served as the club's lone All-Star in 2016.
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.