"[The results were] probably better than expected," Eckstein said. "They were happy with what they found."
Eckstein, on the 15-day disabled list since July 21 after sustaining the injury on the basepaths during the first inning of the Padres' game in Atlanta on July 20, said there is no specific timetable for when he will return to baseball activities but that his calf has benefited from the week off.
"It's definitely looking good in there," Eckstein said. "Hopefully it won't be too long before we can go out there and start testing it."
Eckstein also missed seven starts this month with a calf strain he said was just below his current injury, and manager Bud Black said the most important thing is not to rush Eckstein back.
"You still don't know how long it's going to be," Black said. "But the [MRI] news wasn't a downer."
Jerry Hairston made his sixth consecutive start at second base in Eckstein's absence for Tuesday's series opener against the Dodgers at PETCO Park. During that stretch, he has gone 6-for-22 with two RBIs, three runs and two walks.