Second baseman Kelly Johnson and outfielder Justin Upton remain the only D-backs to rank among the leaders in totals that were released Wednesday.
With 213,788 votes, Johnson has slipped from fourth to fifth in the race at second base behind Philadelphia's Chase Utley (1,103,430), Milwaukee's Rickie Weeks (261,591), Atlanta's Martin Prado (260,349) and Florida's Dan Uggla (214,644).
Johnson faces stiff competition as Utley is the NL's overall leader in votes.
Upton, meanwhile, moved up a spot to 12th among NL outfielders with 259,801 votes. The top three outfielders in the balloting get the starting nod, and the Dodgers' Andre Ethier is third with 606,514 votes.
Upton made his first All-Star appearance in last year's game in St. Louis, while Johnson has never participated in a Midsummer Classic.
This year's game is July 13 at Angel Stadium.
Fans can cast their votes for starters up to 25 times at MLB.com and all 30 club sites using the 2010 All-Star Game MLB.com Ballot Sponsored by Sprint until July 1 at 8:59 p.m. MST. Sprint subscribers can now vote on the go with select Sprint devices. They can learn more about how to vote on their smart phones at MLB.com/Sprint.
Starting rosters will be announced during the 2010 All-Star Game Selection Show on TBS on July 4. Baseball fans around the world will then be able to select the final player on each team via the 2010 All-Star Game Final Vote Sponsored by Sprint.
And the voting doesn't end there. Fans will have the opportunity to participate in the official voting for the Ted Williams Most Valuable Player Award presented by Chevrolet at the Midsummer Classic via the 2010 All-Star Game MVP Vote Sponsored by Sprint.
The All-Star Game will be televised nationally by FOX and around the world by Major League Baseball International. ESPN Radio will provide exclusive national radio play-by-play, while MLB.com will offer extensive online coverage.
Johnson, who was signed by the D-backs as a free agent this offseason after the Braves elected not to offer him salary arbitration, hit .313 with an OPS (on-base plus slugging) 1.154 in April.
Johnson outpolled Cardinals first baseman Albert Pujols, Utley and Brewers left fielder Ryan Braun as NL Player of the Month.
"The usual suspects are always winning that award," Johnson said on the day he won. "With those names, they're pretty much fixtures. It's pretty cool."
Steve Gilbert is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.