Listed at 5 feet, 111⁄2 inches (1.82 m) tall and 185 pounds (84 kg), Moss batted and threw right-handed.

In 1945, Moss served for one year for the United States Coast Guard during World War II.

After being discharged from service, he regained the IL home-run crown and held it for three consecutive seasons, hitting 38 blasts in 1946, 53 in 1947, and 33 in 1948.

Then, in 1946, playing for the Cincinnati Reds, he extended his hitless skein to 22 at bats by going 0–for–8[2] before collecting three singles in four at-bats on April 24 against ace St. Louis Cardinals left-hander Howie Pollet.

[3] Returned to the minor-league Orioles in May, he played in 130 games for Baltimore, then was called up by the parent Cleveland Indians in September.