The online ballot launches on Friday. Fans can cast their votes for starters up to 25 times at MLB.com and all 30 club sites -- online or using a mobile device -- using the 2012 All-Star Game MLB.com Ballot until Thursday, June 28, at 8:59 p.m. PT.
Juan Rivera is the third Dodgers outfielder on the ballot. Catcher A.J. Ellis and shortstop Dee Gordon appear for the first time.
The other infielders on the ballot are first baseman James Loney, second baseman Mark Ellis and third baseman Juan Uribe.
The Dodgers have never had two outfielders voted onto the All-Star starting lineup in the same season. Kemp started last year's game, and Ethier was added to the roster as a replacement for the injured Shane Victorino. Ethier was a starter in 2010.
The Dodgers haven't had an outfielder voted onto the starting lineup in two consecutive seasons since Jimmy Wynn in 1974-75. Kemp could become the Dodgers' first back-to-back All-Star starter since Mike Piazza in 1994-97.