Baker is from nearby Camden, N.J. He had 24 tackles and a career-high three interceptions for the Raiders last season.
The Eagles free agent Sean Jones a one-year deal last week. Jones and second-year pro Quintin Demps are expected to compete for the starting spot at free safety.
Baker signed as a rookie free agent with Buffalo in 2004. He played two seasons with the Bills and spent time with Minnesota and New England before going to Oakland.
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