Running Back By Committee is a term often used by Fantasy Footballers to describe an NFL team with a crowded backfield.
I wouldn't draft a New England running back because Belichick always uses a RBBC.
Points Per Reception is the most common rule variation from standard Fantsy Football scoring. It indicates that players earns a point for every catch and skews value towards those players who catch a lot of passes.
Shonn Greene and Legarrette Blount loses a lot of value in PPR leagues because they don't catch a lot of balls.