BOULDER - Triathlete Timothy O'Donnell of Boulder has signed a one-year contract to join Newton Running's roster of pro athletes.

Boulder-based Newton Running, is a running shoe designer and manufacturer. It is the official run course and shoe sponsor of Ironman in the United States.

Newton provides sponsorships for competitive athletes as well as athletes or groups that are raising money for charities that fit in with Newton Running's philanthropic pursuits.

O'Donnell is the first American on Newton's pro athlete roster. He was the top American finisher at the 2013 Ironman World Championships, placing fifth. Originally from Shaverton, Pennsylvania, O'Donnell now lives in Boulder.

"Tim is a great addition to the Newton tribe, which includes athletes who are not only world-class in their sport, but are first and foremost amazing people who give back to the community," said Andrew Maxwell, who manages Newton's running team. "Plus, Tim's military background and support of organizations like Team Red, White and Blue align well with how Newton has always supported our service men and women."

Prior to becoming a professional triathlete, O'Donnell, 33, served in the United States Navy, becoming an officer in the Special Ops Community after graduating from the United States Naval Academy. During his military career, O'Donnell won six consecutive Armed Forces Championships. Since going pro in 2009, O'Donnell, or "TO,", has racked up 20 professional career wins, including Ironman Brazil in 2013, where he set a course record (8:01:32).

As a member of Team Red, White and Blue, a nonprofit organization that helps wounded military veterans reintegrate into society through social and physical activity, O'Donnell raises awareness for the challenges facing returning veterans. The cause is personal for O'Donnell, whose friend and former Naval Academy triathlon teammate Dan Cnossen, lost both his legs in combat.

Other triathletes on Newton's roster include Rachel Joyce, Craig Alexander, Heather Fuhr, Chris Legh, Tim Berkel, Chris McDonald, Paula Newby-Fraser and Michellie Jones.