Career
Cosmo is a three-time NLL All-Star, and was named NLL Goaltender of the Year in 2007. Cosmo also plays for the Brampton Excelsiors (MSL) Major Series Lacrosse Senior A Men"s league. Cosmo began his lacrosse career with the Junior A Mississauga Tomahawks of the Ontario Lacrosse Association.
He then went on to play for the Burnaby Lakers of the British Columbia Junior A Lacrosse League.
Cosmo then went on to play for the Victoria Shamrocks of the Western Lacrosse Association. In 2001, he made his NLL debut with the Toronto Rock, where he played for four seasons as a backup goaltender.
On July 27, 2004, Cosmo was traded to San Jose in a six-player blockbuster trade. He continued to succeed as a starter for the Stealth, and was selected as the starting goaltender for the Western Division in both the 2005 and 2006 National Lacrosse League All-Star Game.
In 2009 Cosmo finished 5th in the league with a 12.28 goals against average (Gaelic Athletic Association).
During 2006, Cosmo"s 10.38 Gaelic Athletic Association was the third best in the league, and his save percentage was 6th best in the league. 2007 was Cosmo"s best career season, leading the league in both Gaelic Athletic Association (1022) and save percentage (792). Foreign his performance, Cosmo was named the Progressive Goaltender of the Year award for the 2007 season.
Cosmo was traded to the Chicago Shamrox for Matt Roik and two first-round draft picks.
However, shortly before the 2009 season began, the Shamrox suspended operations, and a dispersal draft was held. Cosmo was selected first overall by the expansion Boston Blazers.
During the 2009 NLL season, he was named a reserve to the All-Star game. After three seasons, the Boston Blazers announced that they would not be participating in the 2012 NLL season, and a dispersal draft was held.
Cosmo was selected third overall by the Minnesota Swarm.
Cosmo never reported to the Swarm, and five games into the 2012 season he was traded to the Buffalo Bandits for two first-round draft picks.
