There was little chance Jeff Perrett was going to move to LT on a regular basis. Reason is simple. Nobody from the Als had spoken to him in the offseason about switching positions.
As the Als did not go after any free agents after Josh Bourke left, the next LT was going to be somebody already on the roster. Xavier Fulton for example was available as he only signed with the Riders last week. Jacob Ruby is the top contender for LT because that is who Jim Popp mentioned when talking about potential candidates. Second player Popp named was Philip Blake. So far, that is what has happened in training camp with Ruby playing LT.
On day #2 of training camp, there was talk of Blake playing LT and Ruby moving to RG. When Popp was asked about this, he said they were experimenting and preparing just in case there is an injury at some point during the season.
Now With Picard retiring, the Als put Kristian Matte at center and Philippe Gagnon at G, but we do not know if that is permanent or not. At the time, Jake Piotrowski was supposedly next on the depth chart but was not healthy enough for practice.