Bad news for the Celtics last night. Bad Rondo showed up at the Wells Fargo Center. And he wasn’t alone. Along with him came Bad Kevin, Bad Ray and colossally bad Brandon, but Rajon Rondo had one of his worst games of the playoffs when the Celtics needed him most, so a brutal fact of life continued for Doc Rivers. Rondo giveth and Rondo taketh away. The Celtics point guard wasn’t the only one playing as if it had been a pointless exercise to make the trip to Philadelphia for what could have been a close out game in the Eastern Conference semifinals.