Andrew Krammer Minneapolis Star Tribune

Vikings head coach Kevin O’Connell did not name a starting quarterback for Sunday against the Philadelphia Eagles, nor did he “want to put a percentage” on J.J. McCarthy’s health on Monday. But the second-year QB participated in Monday’s full-team practice for the first time since suffering a high ankle right sprain on Sept. 14 against the Atlanta Falcons.

“This week will be massive for our whole team,” O’Connell said, “but just to see J.J. back out there, getting reps and working through the process of building that foundation back up.”

McCarthy first returned to the field during the team’s bye last week, dropping back and throwing under O’Connell’s watch at TCO Performance Center in Eagan.

“We had some good work,” O’Connell said. “Had some good

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