Zach Johnson tests positive, list of British Open WDs grows

Zach Johnson hits off the second tee during the final round of the John Deere Classic golf tournament, Sunday, July 11, 2021, at TPC Deere Run in Silvis, Ill. (AP Photo/Charlie Neibergall)

Ryan Moore hits off the second tee during the final round of the John Deere Classic golf tournament, Sunday, July 11, 2021, at TPC Deere Run in Silvis, Ill. (AP Photo/Charlie Neibergall)