Sub-replacement level pitching should not be classified as "okay" regardless of how old the pitcher in question is. Aaron Sanchez has been garbage this year, and shouldn't even be in the rotation.
"A bit" is an understatement. Guy has been walking the ballpark this season. Aaron Sanchez isn't a very good pitcher right now as is. Doesn't miss enough bats, and walks way too many hitters. An obvious recipe for disaster.