Adam LaRoche, who is enjoying a tremendous comeback season after being limited to 43 games in 2011 following shoulder surgery, entered play Tuesday fourth in the National League with 42 RBIs and ninth with 29 walks.
The first baseman also has a team-leading 11 home runs and .347 on-base percentage, among qualified Nationals players.
One unlikely candidate could pick up steam as he continues a torrid start to his Major League career.
Rookie of the Year Award candidate Bryce Harper, who is not on the ballot, is a write-in candidate. The 19-year-old is batting .295 with six homers, 18 RBIs, a .381 on-base percentage and a .908 OPS.
Fans can cast their votes for starters up to 25 times at MLB.com and all 30 club sites -- online or via your mobile device -- using the 2012 All-Star Game MLB.com Ballot until Thursday, June 28, at 11:59 p.m. ET.
Another National worthy of a look is Ian Desmond, whose work at the plate and in the field this season has made him one of the game's top shortstops. Desmond's eight home runs and 31 RBIs had him in the second among all NL shortstops in those categories, and his defense has been a big part of the Nationals' early-season success.
Fans can also once again participate in the State Farm Home Run Derby Fan Poll. Fans will have the opportunity to select three players in each league who they would most like to see participate in the State Farm Home Run Derby. The 2012 State Farm Home Run Derby -- part of Gatorade All-Star Workout Day -- will be broadcast live on ESPN, ESPN HD, ESPN Deportes and ESPN Radio in the United States beginning at 8 p.m. ET on Monday, July 9.
The 2012 American League and National League All-Star teams will be unveiled on Sunday, July 1, on the 2012 MLB All-Star Game Selection Show, televised nationally on TBS. Baseball fans around the world will then be able to select the final player on each team via the 2012 All-Star Game Final Vote on MLB.com.
And the voting doesn't end there. The final phase of All-Star Game voting will again have fans participating in the official voting for the Ted Williams All-Star Game Most Valuable Player Award presented by Chevrolet. During the Midsummer Classic, fans will vote exclusively online at MLB.com via the 2012 All-Star Game MLB.com MVP Vote, and their voice will represent 20 percent of the official vote determining the recipient of the Arch Ward Trophy.
The 2012 All-Star Game will be played at Kauffman Stadium in Kansas City on Tuesday, July 10. Come to MLB.com for extensive online coverage of the All-Star Week festivities.
The 83rd All-Star Game will be televised nationally by FOX Sports, in Canada by Rogers Sportsnet and RDS, and worldwide by partners in more than 200 countries via MLB International's independent feed. ESPN Radio and ESPN Radio Deportes will provide national radio coverage of the All-Star Game. MLB Network and Sirius XM also will also provide comprehensive All-Star Week coverage. For more information, please visit allstargame.com or royals.com/asg.