Rubuta ci gaba don wannan sakin layi - Ya buga wasanni 305 don IK Sleipner kuma ya zira kwallaye 152 kuma ya zama zakaran Sweden tare da kulob din a 1938. A duniya ya bayyana a 1934
da kuma gasar cin kofin duniya ta 1938. Keller kuma ya kasance mai sha'awar bandy, teburin tebur da kuma wasan bowling.