Coldfusion not outputting the entire page, cuts off output

http://leaguemanager.playerspace.com/json.cfm?json_type=league_roster&league=73&requesttimeout=99999&return_script=%2Fmanager_pro.cfm%2Fleague%2F73%2Faction%2Fmanageusers%2Fcontent_action%2Fleague_roster

The page seems to just output half the intended data. Sometimes, if I refresh it, I can get it to output completely, but usually it just reaches a point and stops displaying and the loading circle in the browser disappears.

Any ideas why?

This is an AWS load balanced CF10 Server running Windows Server 2008