By Daniel Chavkin Carolina is expected to keep the fifth-year wide receiver. The Panthers and 49ers’ blockbuster trade involving running back Christian McCaffrey, could signal a Carolina fire sale before the trade deadline passes. However, that doesn’t necessarily seem to be the case. ESPN’s Jeremy Fowler reports the Panthers do not plan on trading star wide receiver DJ Moore as they view him as a “foundational piece” to their offense. Moore is in his fifth year with the team, and surpassed 1,000 yards receiving with four touchdowns in each of his previous three seasons. However, it has been a…