The 28-year-old is a career .194 hitter in parts of seven big league seasons and was acquired for his abilities behind the plate -- not in the batter's box.
Anything Mathis can provide offensively likely will be considered a bonus this season but that doesn't mean the club has extremely low expectations.
"We see a guy that has strength, athleticism and bat speed which would leave you to believe there's more than a .190 hitter in there," Blue Jays manager John Farrell said.
"The thing we've talked about, and just tried to instill into him, our belief and what we see and then to provide those opportunities at the plate ... I think we see a guy that's capable of more than what the performance numbers have shown."