| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Karl (Cläes Zacharias-)•Karlsson | |
| Used name | Karl•Karlsson | |
| Other names | Carl Carlson | |
| Born | 16 November 1887 in Båraryd, Gislaved, Jönköping |  SWE |
| Died | 8 April 1964 (aged 76 years 4 months 22 days) in New York, New York |  USA |
| Measurements | 166 cm | |
| Affiliations | Swedish American AC — New York, New York | USA |
| NOC | Sweden | SWE |
Karl Karlsson anglicized his name to Carl Carlson, after the 1912 Olympics, where he lost by fall in the first round against Russia’s Pavel Pavlovich and withdrew. Carlson later lived in Massachusetts, New Hampshire, and New York. Karlsson/Carlson wrestled frequently in the USA after the 1912 Olympics. His identity was unknown for many years until discovered by one of the OlyMADMen, Carl-Johan Johansson, mainly because Karlsson went back and forth between Sweden and the United States.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1912 Summer Olympics | Wrestling | SWE |
Karl Karlsson | |||
| Featherweight, Greco-Roman, Men (Olympic) | AC r2/8 |
