In his eight-year NLL career, Lough played for the Montreal Express, Columbus Landsharks, Arizona Sting, and Toronto Rock.
Lough was originally drafted in the National Lacrosse League by the now defunct Ontario Raiders, though he did not play for them.
The Express folded prior to the 2003 Season, and in the resulting dispersal draft, Lough was acquired by the Columbus Landsharks (later the Arizona Sting) in the 1st round (3rd overall).
[1] In 2004, Lough was co-winner of the NLL Sportsmanship award, and has made All-Star Game appearances in 2005, 2006, 2007 and 2008.
After the 2007 season, Lough became an unrestricted free agent and signed a two-year contract with the Toronto Rock.