Both people spoke to The Associated Press on condition of anonymity Tuesday because the deals won’t be official until the league year starts Wednesday.
Ngata leaves the Detroit Lions to add depth on a strong front four that already landed Michael Bennett last week in a trade with Seattle. Nelson, who started six games in four seasons in Denver, bolsters the special teams and gives Philadelphia another option at linebacker.
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The Super Bowl champions released veteran tight end Brent Celek earlier in the day and lost tight end Trey Burton to Chicago.
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