Adam Wainwright normally would have left on Thursday for Jupiter, Florida, site of Cardinals spring training, where he has spent the past 17 springs. Instead the 40-year-old righthander has been tossing balls into a net and working out with his old Glynn Academy high school team in Brunswick, Georgia, when he hasn’t been battling COVID. Wainwright, who took a few days off during 2021 to tend to his family members when they came down with COVID, contracted a mild form of it last week. “I had a couple of days where I felt pretty crummy,” he said. “Small fever and the chills. Then I had a couple …