At the 2005 World Championship, Fenson's rink finished the preliminary round in a six-way tie for first place, but was eliminated from competition in a tie-breaker against defending Olympic champion Norway.

At the Olympics, Fenson's rink had a 6–3 record in the round robin portion of the tournament, losing only to Italy and eventual finalists Finland and Canada.

He and his team represented the United States at the 2011 Ford World Men's Curling Championship at Regina, Saskatchewan, in April.

The team opened with a win against Denmark, but suffered a series of close losses and finished in 10th place with a 3–8 win–loss record, their worst at a world championship.

However, they had better fortune at the Laphroaig Scotch Open, where they flew through the knockout round and defeated David Brown in the final to win the event.

In the playoffs, he was defeated by Heath McCormick, who had previously beaten him in the round robin, but rebounded with a win in the semifinal over former teammate John Shuster.

In the final, he lost a close game to Heath McCormick, losing his bid for a third consecutive nationals title and a chance to play at the world championships.

Fenson and his team played at the 2013 United States Men's Curling Championship, but failed to qualify for the playoffs, losing to McCormick in a five-team tiebreaker.