There are already reports that this injury is moderately serious:
Hearing #Rays Longoria has a hamstring issue, guesstimate is he’ll be out 6-8 weeks. Could have been worse.
— Marc Topkin (@TBTimes_Rays) May 1, 2012
Hamstrings are tough injuries to come back from and there’s no doubt the Rays will be extra-careful with their star third baseman. Elliot Johnson finished Monday’s game at third base after Longoria departed, and he and Jeff Keppinger will likely share a lot of the time there, though with Longoria possibly out for two months, the Rays might seek a trade. They’d certainly have snapped up Brandon Inge, had he still been available.
UPDATE: Though this was speculation on Marc Topkin's part earlier Tuesday, and the Rays had denied it at the time, Topkin tweeted confirmation late Tuesday afternoon:
#Rays say Longoria has partial tear of left hamstring. Out 6-8 weeks.— Marc Topkin (@TBTimes_Rays) May 1, 2012