The 2008 first-round draft choice out of Arkansas spent the first five years of his career with the Cowboys. The free agent had visited with the Eagles and first-year coach Chip Kelly last week before working out for the New England Patriots.
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The 26-year-old Jones started seven games last season while playing in all 16, finishing with 402 yards on 111 carries for a 3.6 average. He had three rushing touchdowns with 25 receptions for 262 yards and two TDs through the air.
McCoy was limited to 840 yards last season after rushing for a career-high 1,309 yards in 2011. He missed four games late in the season with concussion symptoms.