Cubs Place Javier Assad on IL, Sign Vinny Nittoli

Cubs face pitching challenges with multiple starters on injured list; Hayden Wesneski to join rotation.

Javier Assad is on the 15-day injured list with a right forearm strain.
Vinny Nittoli signed to fill Assad's roster spot; Yency Almonte moved to 60-day IL.
Assad's injury adds to Cubs' pitching woes with three starters recently sidelined.
Hayden Wesneski expected to step into the rotation in Assad's absence.
Cubs' playoff hopes impacted as they struggle with a depleted pitching staff.