Karl Johnson (Kalle Masen) boxer
- bouts
- 25
- won
- 9
- lost
- 13
- draw
- 2
- Status
- inactive
- Division
- light heavyweight
- Debut
- 1923-05-04
- Height
- -
- Reach
- -
- Age
- 47
- Born
- 1901-10-04
- Death
- 1948-12-27
- Nationality
- Sweden
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1929-02-10 | Joe Sylvain | LLLLLL | Lorensbergs Circus, Gothenburg | WIN Points |
| 1926-10-19 | Gosta Lundqvist | W | Cirkus, Stockholm | WIN Technical knockout |
| 1925-12-04 | John Strand | WDWLL | Cirkus, Stockholm | LOST Points |
| 1925-11-17 | Pierre Charles | LLLWLL | Auditorium, Stockholm | LOST Points |
| 1925-09-06 | Jack Townsend | WLLLWW | Ingentingskogen, Stockholm | LOST KO |
| 1925-06-17 | Wolf Larsen | DLWDLL | Mitchel Field Arena, Mineola | WIN Points |
| 1925-06-13 | Roscoe Hall | LLLWLW | Ridgewood Grove, Brooklyn | LOST Points |
| 1925-03-11 | Maxie Rosenbloom | WWWDWW | Manhattan Casino, New York | LOST Points |
| 1925-02-18 | Maxie Rosenbloom | WWWWWD | Manhattan Casino, New York | LOST Points |
| 1925-01-05 | Young Bob Fitzsimmons | WWLWLW | Broadway Auditorium, Buffalo | LOST Technical knockout |
| 1924-11-14 | Chief Halbran | WWWWLW | Madison Square Garden, New York | LOST Points |
| 1924-10-16 | Al Roberts | LWWLWL | Perth Amboy | LOST Technical knockout |
| 1924-09-11 | Joe Silvani | DLWL | Boyle's Thirty Acres, Jersey City | NC |
| 1924-08-15 | Tom Maxted | WWLWLW | Ocean Park Casino, Long Branch | DRAW |
| 1924-08-11 | Jimmy Martin | LLWW | Queensboro Stadium, Long Island City, Queens | WIN KO |
| 1924-08-08 | Chief Halbran | WLLD | Cycledrome, New Bedford | LOST Points |
| 1924-06-18 | Jack Middleton | LWLWW | Velodrome, New York | WIN Points |
| 1924-05-09 | George Erntink | WWWWW | Madison Square Garden, New York | WIN Points |
| 1924-04-01 | Joe Smith | LDL | New York | LOST Technical knockout |
| 1924-03-13 | Joe Smith | LD | Laurel Garden, Newark | WIN Points |
| 1923-12-01 | Yale Okun | debut | New York | LOST Points |
| 1923-07-29 | Martin Tancred | WWWWWL | Gamla Festplatsen, Hebyås, Heby | DRAW Points |
| 1923-07-28 | Adolf Lofstrand | L | Gamla Festplatsen, Hebyås, Heby | WIN Points |
| 1923-07-17 | Willem Westbroek | WWLLWL | Cirkus, Stockholm | LOST Points |
| 1923-05-17 | Svend Helgesen | WWWWWW | Cirkus, Stockholm | DRAW Points |
| 1923-05-04 | Leon Randol | LL | Lorensbergs Cirkus, Gothenburg | WIN Points |