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National Museum of Nuclear Science & History

Morris “Moe” Berg (1902-1972) was an American catcher in Major League Baseball from 1926-1939. He later became a spy for the Office of Strategic Services during World War II.

Berg was born in New York City on March 2, 1902.  After graduating from Princeton in 1923, he began his career in Major League Baseball as a catcher, playing for several teams, including the Brooklyn Dodgers and the Boston Red Sox. He was never more than an average player, often spending time on the bench, but his soaring intellect and gift for languages earned him the title of “brainiest guy in baseball.” Berg was fluent in German, Japanese, French, Italian, Spanish, and Portuguese and had some knowledge of at least a dozen other languages. In three years during the off season, he earned a law degree from Columbia University in 1928 and eventually took a position with a Wall Street law firm while still playing baseball.

After several disappointing seasons with the Red Sox, and two years of coaching, Berg quit baseball in August 1939 and began looking for a way to get involved with the war effort.


The Alsos Mission

In 1943, Berg was recruited by the Office of Strategic Services to travel overseas and spy on the German atomic bomb program. Berg’s gift for languages and quick wit made him the perfect candidate for the job, and he was selected for a special mission codenamed “Project Larson”, as part of the ongoing Alsos Mission. The purpose of Project Larson was to interview top Italian physicists to see if they knew anything about a German bomb program.

In 1944, Berg traveled to Italy and met with physicists Edoardo Amaldi and Gian Carlo Wick, who admitted that they had not done any atomic research for the Germans and suspected that even if the Germans were working on an atomic bomb it would have taken them at least a decade to complete it. Berg continued to visit with other Italian scientists throughout the summer, though little was learned about a German nuclear program.

In December 1944, the OSS learned that renowned German physicist Werner Heisenberg was leaving Germany to give a lecture in Zurich. Berg was ordered to attend the conference and to make contact with Heisenberg. If there were any indications that the Germans were working on the bomb, he was ordered to shoot Heisenberg (inside the lecture hall if necessary). On December 18, Berg attended the lecture and quietly sat with a pistol inside his pocket before a small audience of professors and graduate students. He had also been given a cyanide tablet. Heisenberg did not reveal anything about a German nuclear program during the lecture, but Berg was able to meet with Heisenberg’s Swiss host and OSS source Paul Scherrer and secure an invitation to dine with Heisenberg later that week. Berg listened carefully to the conversation that evening, but there was no indication that the Germans were working on an atomic bomb. 

Berg returned to the United States on April 25, 1945, and resigned from the Strategic Services Unit, the successor to the OSS, in August.

Later Years

After the War, Berg declined several offers to coach for Major League Baseball. In 1952, Berg was hired by the CIA to use his old contacts from World War II to gather information about Soviet atomic science, but his efforts produced little intelligence. Berg died in Belleville, New Jersey, on May 29, 1972.

Morris “Moe” Berg's Timeline
1902 Mar 2nd Born in Harlem, New York.
1923 Received B.A., magna cum laude in Modern Languages from Princeton University.
1923 Jun 27th Signed first Major League Baseball contract with the Brooklyn Robins.
1930 Feb 26th Received LL.B. from Columbia University.
1943 Aug 2nd1945 Apr 25th Joined the Office of Strategic Services as a Paramilitary Operations Officer for the Manhattan Project's Alsos Mission.
1972 May 29th Died in Belleville, New Jersey.

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