ALLEN PARK, Mich. (AP) - The Detroit Lions made a big investment in quarterback Matthew Stafford during the offseason and, so far, he's earning it. The fifth-year veteran has 635 passing yards and four touchdowns two games into the season. He signed an extension that will pay him $41.5 million in guaranteed money and as much as $76.5 million total. He'll get a chance to add to his hot start Sunday when the Lions travel to Washington, which has seen opposing signal-callers complete 73 percent of their passes with six touchdowns in the new season. Stafford was 24 for 36 through the air in Sunday's 25-21 loss at Arizona for 278 yards and two touchdown passes to Calvin Johnson, including a 72-yarder.