 Majeski's contract was purchased by the Boston Braves, then known as the Boston Bees and, he made his major league debut with the team on May 17, 1939 at the age of 22.During his rookie season, Bees' manager Casey Stengel converted him into a third baseman.Majeski began the season hitting above .300 for the first half of the season before a mid-season slump saw his average dip to .238 but, he recovered to finish the year with a .272 average along with 7 home runs and 54 runs batted in.