In his finest season, 1954, he batted .317 with 17 home runs for the Salem Senators of the Class A Western International League.

Warner batted left-handed and threw right-handed, stood 6 feet 2 inches (1.88 m) tall and weighed 195 pounds (88 kg).

His managing career concluded with a return to the Twins' organization in 1983, when he led the Class A Visalia Oaks of the California League to a division title.

One of his players that season was future Twins star and Baseball Hall of Fame member Kirby Puckett.

Later in the 1980s, Warner scouted for the Twins and then the San Diego Padres, based in Reeders, Monroe County, Pennsylvania.