When the Padres acquired 32-year-old Nick Pivetta last offseason, they probably thought they'd be getting a reliable innings eater. That's what he'd been during his four years in Boston.
His best ERA in Boston was 4.04 and his worst was 4.56. The most innings he threw was 179 2/3, the fewest was 142 2/3. His best bWAR was 2.5, his worst was 1.7. Simply put, Pivetta spent his whole career fitting the mold of an average starting pitcher. It was good enough to give his team five solid innings every fifth day, but nothing more.