"It's wear and tear, inflammation, little stuff here and there," he said. "But [there's] inflammation, fluid and stuff. The doctors and the trainers were telling me that it's just something that's going to take a couple weeks of treatment and recovery."
Johnson, who has posted a 2-4 record with a 2.23 ERA as a late reliever for the Orioles, said that he was ambivalent about the test results. He's happy that it's not something serious, but upset that he won't pitch again soon.
"I think it's a little bit of both," he said before Saturday's postponement. "It's definitely disappointing to not finish the season healthy, but it's good news that it's not something that's serious. I guess you take the good news with the bad."
Johnson started for most of his Minor League career and there has been talk that he could return to that role next season, a subject he refused to speculate on Saturday. Johnson said he doesn't mind which role he fills with the Orioles, but he admitted that he had gotten comfortable in relief during his transitional rookie season.
"The season technically isn't over, but personally, it's a different role than I've ever thrown in before," he said. "I guess it's a big positive to kind of get a foothold, I think, and I'm optimistic going into next year."
Spencer Fordin is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.