Bills RE Mark Anderson (knee surgeries) is now participating fully at OTAs. A predictable free-agent flop in 2012, Anderson missed all but five games in his first season with Buffalo after signing a four-year, $20 million contract. His year was primarily derailed by two knee surgeries to repair lateral meniscus damage. Anderson remains the Bills' best pass rusher beyond Mario Williams, so he's likely ticketed for a big role in Mike Pettine's new defense.