Listed at 6 feet 0 inches (1.83 m) and 163 pounds (74 kg), Slayton batted and threw right-handed.

[5] Slayton's major league career was limited to three appearances for the Boston Red Sox during a one-week period in July 1928.

[6] On July 21, he pitched the final inning of a Boston home loss to the Cleveland Indians, allowing no runs.

[7] On July 25, he pitched the final 4+1⁄3 innings of a Boston road loss to Cleveland, allowing one run.

[8] One July 28, he pitched 1+2⁄3 innings of a Boston road loss to the Detroit Tigers, allowing two runs.