Castillo is currently sitting in second among AL catchers (339,902 votes), behind Kansas City's Salvador Perez (420,268). Jonathan Schoop rounded out the position players for the O's, sitting in fifth place among second basemen.
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.com At Bat and MLB.com Ballpark mobile apps.