During training camp it is usually only a matter of time until the Eagles make a trade.

Which is why this report out of Miami is one to keep an eye on.

The Miami Dolphins are "actively and aggressively shopping for a starting cornerback", according to Omar Kelly of the Sun Sentinel. The Dolphins are apparently not happy with what they have seen from their cornerbacks so far in training camp.

A potential deal between the Eagles and the Dolphins makes sense on a number of level. Let's read some tea leaves.

The Eagles are deep at cornerback and have been rumored to be open to moving one of them. The obvious name to keep an eye on here is cornerback Ronald Darby. who is set to become a free agent at the end of the 2018 season. The fact the Eagles have not yet signed him to an extension could be a sign they are not 100% sure they want to commit the money it will take to sign him long term.

Darby would make sense for the Dolphins for two reasons. First, Darby is young and loaded with potential. He has yet to meet that potential, but he has elite speed and played well towards the end of last season. Darby went to college in Florida so you would imagine he would be opening to signing an extension with the Dolphins next offseason.

It is also worth noting that there was a Miami Dolphins scout at the Eagles' preseason opener against the Pittsburgh Steelers last Thursday.

From the Eagles perspective, dealing Darby would secure an asset for him right now as opposed to the risk of losing him next offseason for nothing. Eagles executive vice president of football operations Howie Roseman has shown that he is always a fan of selling on a player early instead of seeing out the risk of losing him in free agency.

There is no denying the Eagles would not be as good at cornerback without Ronald Darby but they do have some pieces to replace him.

Trading Darby would allow the Eagles to move Sidney Jones to the outside as opposed to the nickel cornerback spot. Jones was considered a top-10 talent at Washington as an outside cornerback and has shown he is completely recovered from the torn Achilles that cost him all of last season.

The Eagles have also been giving two cornerbacks -- Avonte Maddox and De'Vante Bausby -- plenty of reps at nickel cornerback recently.

The Dolphins and Eagles have a history of making trades. It was the Dolphins who helped the Eagles get to No. 8 overall in 2016, the first step towards the Eagles trading up to No. 2 for quarterback Carson Wentz. The Eagles also struck a deal with the Dolphins last offseason for running back Jay Ajayi.

It would not be surprising at all if the Dolphins search for a cornerback included a call to the Eagles about Darby.

Eliot Shorr-Parks may be reached at eshorrpa@njadvancemedia.com. Follow him on Twitter @EliotShorrParks. Find NJ.com Eagles on Facebook.