Birr skipped his team to victory at the 2007 United States Curling Men's Championships, beating out teams such as Olympic bronze medalist Pete Fenson and former national champion Jason Larway in the process.

His victory qualified his team of Bill Todhunter, Greg Johnson and Kevin Birr to a berth at the 2007 Ford World Men's Curling Championship representing team USA.

There, Birr's was the only team to defeat Glenn Howard's Canadian team in the round robin when Howard wrecked on his last rock, and Birr bumped out a Canadian stone to score three giving him a victory.

However, in the playoffs Birr lost 7–2 to Canada in the 1 vs 2 page playoff game, and then lost in the semi-final to Germany's Andy Kapp rink by a score of 6–4 earning Birr and the rest of team USA a bronze medal.

Birr works as icemaker at The Four Seasons Curling Club in Blaine, Minnesota.