A Piscataway man who owned and ran foreclosure-rescue companies pleaded guilty to his role in a mortgage-fraud scheme that cheated mortgage lenders out of more than $10 million, federal authorities said. Ronald Harris Jr., 41, pleaded guilty before U.S. Magistrate Judge Patty Schwartz in Newark to a one count each of conspiracy to commit wire fraud and conspiracy to commit money laundering, said U.S. Attorney Paul J. Fishman.