The 28-year-old Longoria is a three-time All-Star and two-time fan-elected starter (2009, '10). He had 407,724 votes, with Donaldson tallying 464,367.
Longoria entered Tuesday's action hitting .271 with five homers and 23 RBIs through 52 games this season. He was tied for first among AL third basemen with 55 hits and was third in batting average.
Rays first baseman James Loney could also receive consideration for a spot. Entering Tuesday, Loney was hitting .294 with two homers and a team-leading 28 RBIs and 27 hits this season. He was second among in AL first basemen in batting average and third in hits.
Fans can cast their votes for starters at MLB.com and all 30 club sites -- online or on a mobile device -- using the 2014 All-Star Game MLB.com Ballot Sponsored by Experian until Thursday, July 3, at 11:59 p.m. ET. The 2014 All-Star Game will be played at Target Field on Tuesday, July 15.
Fans may submit up to 25 online ballots, but they can also earn a one-time bonus of 10 additional online ballots. To access these additional online ballots, you must be logged into your MLB.com account when you submit any online ballot. If you do not have an MLB.com account, register on the site in accordance with the enrollment instructions for a free MLB.com account.
The 2014 All-Star teams will be unveiled on the 2014 MLB All-Star Game Selection Show during the weekend of July 5-6, with further details to follow on MLB.com. The AL will have nine elected starters via the fan balloting program, while the NL will have eight fan-elected starters. Pitchers and reserves for both squads -- totaling 25 for the NL and 24 for the AL -- will be determined through a combination of "Player Ballot" choices and selections made by All-Star managers Mike Matheny (NL) and John Farrell (AL).
Immediately following the announcement of the rosters, you can select the final player for each league's 34-man roster via the 2014 All-Star Game MLB.com Final Vote Sponsored by Experian. Choose again at that point from among five players in each league. The Final Vote returns for its 13th season with more than 430 million votes cast to date, and you'll be able to make selections on MLB.com, club sites and your mobile device.
You'll be on a voting tear at that point, having already selected starters and the last men, and the ritual will not end there. The final phase of All-Star Game voting will again have fans participating in the voting for the Ted Williams All-Star Game Most Valuable Player Award presented by Chevrolet. During the big game, vote exclusively online at MLB.com via the 2014 All-Star Game MLB.com MVP Vote Sponsored by Pepsi. The fan voice will represent 20 percent of the overall vote that determines the recipient of the Arch Ward Trophy.
MLB.com will provide extensive online coverage of the All-Star Week festivities.
The 85th All-Star Game will be televised nationally by FOX, 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 SiriusXM will also provide comprehensive All-Star Week coverage. For more information, please visit allstargame.com.
Jamie Ross is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.