San Diego manager Bud Black said Tuesday morning that Headley was feeling better.
He said the exam does not change the expected timeline for his recovery. Headley is expected to be out two to three weeks recovering from the strain of his right calf.
Headley was injured during a drill last Saturday. He's coming off minor knee surgery in the offseason.
Black also said that reliever Alex Torres is on his way to camp after having visa troubles in his native Venezuela and is expected to arrive later this week. Torres was acquired in a trade with Tampa Bay during the offseason.