Hoskins was among the top prospect performers on Tuesday .
Rhys Hoskins has hit his share of home runs this season , but none have been bigger than the walk - off grand slam he hit Tuesday to lead Double - A Reading past Erie , 11 - 9 .
Rhys Hoskins was among the top prospect performers on Tuesday .
Rhys Hoskins has hit his share of home runs this season , but none have been bigger than the walk - off grand slam he hit Tuesday to lead Double - A Reading past Erie , 11 - 9 .