While the Eagles did not report a name, sources confirm to ESPN's Tim McManus the player was wide receiver JJ Arcega-Whiteside.
The Eagles said close contacts were also identified through contact tracing and are in self-isolation, as well.
McManus said those close contacts include wide receivers John Hightower and Deontay Burnett.
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Sources tell McManus all three have been placed on the Eagles Reserve/COVID-19 list.
The Eagles said they are following all NFL-NFLPA protocols.
McManus reports defensive end Vinny Curry and running back Corey Clement will also be placed on the COVID-19 list.
"I'm told they are both close contacts and have tested negative to date," McManus said.
According to ESPN, those cases are separate from each other and JJ Arcega-Whiteside.
Here is the Eagles full statement:
"The Philadelphia Eagles received confirmation this morning that a player tested positive for COVID-19. The individual and close contacts who were identified through contact tracing are in self-isolation. We are following NFL-NFLPA intensive protocols and remain in communication with the league on this matter."
The Eagles gave an updated injury report which listed Arcega-Whiteside, Clement, Curry, and Hightower suffering from illness.
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The Eagles play the Browns in Cleveland on Sunday.