"They said I got food poisoning," Johnson said. "I just had some bad food. They were able to narrow it down and treat it."
Manager Buck Showalter wouldn't commit to Johnson's availability after the right-hander played catch Friday afternoon. Johnson wasn't sure, himself, before he threw.
"It might be a stretch, but we'll see," he said.
Johnson described himself as lethargic after spending four days at the hospital, but he said he began feeling better Thursday night -- well enough to watch the NFL Draft and some NHL hockey.
"I've been laying on my back for four days," Johnson said. "Just getting on my feet, running around, doing some card stuff was good."
Johnson said he was both frustrated and scared during the ordeal.
"It was pretty bad," Johnson said. "You're going to wash your mics after this."