SANTA CLARA – General manager John Lynch received the text message Wednesday from Dr. Tim McAdams that might have come as a surprise to many of the teams that passed on linebacker Reuben Foster during the draft.

The 49ers’ team physician declared Foster’s surgically repaired right shoulder is ready to play football. The 49ers are scheduled for their first practice of training camp on Friday, and Foster will be a full participant.

“We feel great about our doctors, our medical program here,” Lynch said on Thursday, as the 49ers reported to training camp. “Our trainer, Jeff Ferguson, is as good as there is in the league. Dr. McAdams, world-renowned. He has the Stanford name behind him.

“We challenged him numerous times. From his observation, the shoulder was good.”

Foster’s tumble to the back end of the first round was widely blamed on his shoulder condition. The 49ers traded with the Seattle Seahawks to select Foster with the No. 31 overall pick. Almost immediately, the 49ers were scrutinized for making the selection.

ESPN’s Adam Schefter reported some teams did not even consider drafting Foster. One “well-placed source with knowledge of the injury” told Schefter that Foster’s surgery “didn’t take.”

The 49ers’ willingness to clear Foster for the first day of camp is a reality that appears to be in stark contrast to the opinions around the league that Foster’s shoulder would require additional surgery. The 49ers expect Foster to be ready Sunday for the first padded, contact practice of training camp.

“We pride ourselves in doing all of our due diligence, not afterward, but before we make the decisions,” Lynch said. “We’d done exhaustive research on Reuben Foster in a lot of different areas. Medically was one area.”

Coach Kyle Shanahan said he the nature of Foster’s injury convinced him that even the worst-case scenario, in the big picture, was not so bad. Foster sustained a torn rotator cuff in Alabama’s national semifinal game against Washington and played the championship game against Clemson with the injury.

“I was proud of our doctors for putting themselves out there and giving their honest opinion about what they felt,” Shanahan said. “They feel it is healed, and it’s going to be good. I respect them for doing that. They went against the norm on that, and that isn’t always easy.

“(I’m) pretty confident when it is a shoulder injury, if it doesn’t heal the right way or it’s done wrong, you have to re-do a surgery, yes, it’s time, but it’s not going to affect the guy we saw on tape.”