EAST RUTHERFORD, N.J. — So far, so good for Matthew Stafford and the Detroit Lions. Eli Manning and the New York Giants are heading in the opposite direction. Stafford threw for two touchdowns, rookie Jamal Agnew broke the game open with an 88-yard punt return and the Lions beat the Giants 24-10 on Monday night. The Lions (2-0) sacked Eli Manning five times and Stafford put together another big game while sending the Giants (0-2) to a second straight disappointing performance.