The Cubs announced the signings of pitchers Manny Corpas and Andy Sonnanstine on Monday. Both players were signed to split contracts. Sonnanstine, 28, has pitched parts of five seasons with the Rays. The right-hander began his career as a starter but was used primarily as a reliever the past two seasons. Sonnanstine will give the Cubs some depth and versatility they lacked last season when both Randy Wells and Andrew Cashner were lost from the rotation due to injuries.