From TSN Ice Chips:
While the team began doing some hard skating drills 50 minutes into practice, Ray Emery left the ice due to back spasms, he did it while playing baseball on Sunday.
Basketball I could see.
As if he needs another thing from getting starts. Gerber's playing great (1st in W, 6th in GAA, 4th in SV%) but starting Thursday the team has a busy schedule where they play 6 games in 10 days and Emery would surely start a number of them. If he's unable to get in there due to back issues and Gerber keeps playing like he is, we may have a number 1 goalie much earlier than Paddock planned.