There’s always a buzzword or two every preseason that sums up what the big focus is heading into the season. This year the two are somewhat related: “Flexibility” and “curveball.” They’ve used that term so much I half expect Bert Blyleven to be announced as an assistant coach or for Jason Varitek to signal a zone from the sidelines by dropping two fingers. The team is very clearly committed to changing speeds and showing teams new looks.