http://www.profsl.com/smf/index.php?topic=19084.msg93047#msg93047Free agency will start on July 28th at 12:00pm, that means that waivers will open up 1 week after.
Waivers open August 4th at 12:00pm
Other important dates are:
Offseason Free Agency Ends - September 30th, 2015 @ 12:00am
Waiver Free Period Begins - September 30th, 2015 @ 12:00am
Season Begins - October 7th, 2015 @ 12:00am