NFL Media Insider Ian Rapoport reported early Wednesday that tests confirmed Lawrence's injury, and the pass rusher will need surgery to set it, per a source who has spoken to the player. Lawrence's recovery time is eight to 12 weeks, per Rapoport, which knocks him out for at least the first month of the season.
During his media availability on Wednesday, Dallas head coach Jason Garrett wouldn't go into detail but said Lawrence had a foot injury and confirmed the eight-to-12 week timeline.
The organization already was struggling to find pass rushers, and they hope that Lawrence can make a big impact this season at defensive end. A broken foot is a significant setback.