The trade will not be officially finalized by the league until later this week, when the new league year begins. Both players traded away were added by recently fired head coach Chip Kelly, as the team looks to move past the Kelly era with new head coach Doug Pederson.
Maxwell was signed last off-season by Philly, and was tabbed as the team No. 1 cornerback. He would go on to record just 64 tackles and two interceptions under a six-year, $63 million deal.
Alonso also struggled for the Eagles this past season, posting a career-low 43 tackles and one interception in just 11 games. The linebacker dealt with multiple injuries to the same knee in which he tore an ACL two seasons ago.
Maxwell began his career with the Seattle Seahawks, spending his first four seasons there from 2011-2014. He played in just nine games each of his first two seasons, predominantly special teams his rookie year, before becoming a starter and a member of the "Legion of Boom" in Seattle's Super Bowl run.
Both Maxwell and Alonso are hoping a change of scenery will help get their numbers back on track, as they look to help a Dolphins defense that ranked 25th in the league in 2015.