ST. LOUIS (AP) — The St. Louis Cardinals and Adam Wainwright have agreed to a contract for the 2020 season, increasing the likelihood the veteran pitcher finishes his career with the only major league team for which he has ever played. The 38-year-old Wainwright was drafted by the Braves in 2000 and traded to the Cardinals three years later. He made his major league debut in 2005 and has been a…