Career
He currently plays second for the Marc Pfister rink. Keller threw fourth stones for the Swiss junior team (skipped by Yannick Schwaller) at the 2014 World Junior Curling Championships, winning a gold medal. Keller was invited to be the alternate on the Swiss team at the 2015 World Junior Curling Championships.
In 2014, Keller joined the Pfister rink.
They represented Switzerland at the 2015 Ford World Men"s Curling Championship, finishing in 7th place.