Penske to make driver change?

Word is that Roger Penske is not happy with the performance of his two IndyCar drivers. Roger likes to win and win often and he is not. According to a report on Wind Tunnel, Penske may be ready to make a run at young Graham Rahal. After Rahal ran away and hid from Penske driver Helio Castroneves at St. Pete earlier this year, we would not be surprised.