He's been off for a "planned break," and it turns out that's built into his contract. 

"After recovering from cancer last year that sidelined him for a large portion of the season, Martinez came back stronger than ever. But as he negotiated a new contract in the off-season, the Florida resident and Sportsnet management decided on a 100-game schedule that allows him to stay healthy and fresh and enjoy some down time."

After planned break, Blue Jays broadcaster Buck Martinez to return next week