Pittsburgh Pirates catcher Francisco Cervelli has been placed on the seven day concussion list. "Per the Pirates, Cervelli reported symptoms to the medical staff after last night's game." wrote Adam Berry of MLB.com. Jacob Stallings as been recalled from Triple-A Indianapolis. Elias Diaz will be the signal caller Friday against Arizona, he is 2-for-3 against Patrick Corbin. Diaz is hitting .298 on the season, but may share time with Jacob Stallings who was slashing .289/.335/.396 with 25 RBI[...]