The 2 paragraphs before says:
“He’s a guy I try to get on the field, no question,? said Noel Thorpe, an assistant head coach and the team’s defensive coordinator. “We’re going to do everything we can to put him in positions that he can go out there and be disruptive. Ky, over the course of the last four years, fits our defence and the style that we play because of his versatility and what he can do.
“He’s a warrior. He’s everything we look for. We like to say this guy’s going to empty his tank. He’s going to give you all he’s got on each and every play. He’s going to make plays and going to be a difference maker.?
To me, it just sounds like Thorpe thought the defense and team would be off with Hebert than with Martin even if Martin is a NI. If Hebert were not on the roster and Thorpe was given the choice between Martin and Boulay, Shortill, Ackie, or Koster, I suspect Thorpe would have stayed with the 4-3 and played Martin.