"Just some inflammation, some swelling, some irritation, but nothing structurally with the labrum or the rotator cuff, the things that are really important to pitching," Bradley said on Thursday. "They were actually really good. To have that confirmed was some relief."
There is no timetable for Bradley's return and D-backs manager Chip Hale said the first course of action will be 10 days of rest.
Bradley made one rehab start for Triple-A Reno on June 24, but felt pain in the shoulder after the outing. He then decided it would be best to visit Andrews for the second opinion.
Bradley's injury was originally diagnosed as shoulder tendinitis, but he said the throwing caused it to become a more severe case of the injury.
"It's just frustrating, annoying," Bradley said. "I just want to be healthy and I just want to pitch."
This is Bradley's second stint on the disabled list in his rookie season. He missed two weeks earlier in the year after being hit by a line drive in the face.
Bradley, the team's first-round Draft pick in 2011, is 2-3 with a 5.80 ERA in eight starts this season.
"I think right now rest is the biggest thing," Bradley said. "We're doing all kinds of treatment. We're basically throwing everything we have at it to get it calmed down, get the swelling and inflammation down. It's going to be about strengthening and see how the arm reacts after that."
• Hale said the team is not ready to announce its starting pitcher for Saturday's game against the Rockies, which could be the return of Patrick Corbin. The left-hander has not pitched since 2013 after undergoing Tommy John surgery and will pitch for either the D-backs or a Minor League affiliate on Saturday.
If Corbin does not start in the Majors, the D-backs could pitch long reliever Josh Collmenter or promote another starter from the Minors for a spot start.
• Outfielder Ender Inciarte (strained right hamstring) will not be ready to come off the disabled list at the end of his 15 days. Hale said Inciarte will be playing on a rehab assignment during the All-Star break and the target for his return will be the first game after the break on July 17 against the Giants.