PHILADELPHIA (973espn.com) - Any potential Eagles playoff run will have to occur without both of their starting cornerbacks.

Jalen Mills joined Ronald Darby on injured reserve Saturday, a day before Philadelphia's key divisional matchup in Dallas.

Mills had already missed the previous four games with a left foot injury suffered in London against Jacksonville and recently showed up with a walking boot, indicating either a setback or a slower than expected healing process. Either way Mills is now done for the season joining Darby who was lost to a torn ACL.

Mills finished his third professional campaign having started eight games and compiling 50 tackles -- two of them for a loss -- as well as 14 pass breakups.

The Eagles will move forward with second-year players Sidney Jones and Rasul Douglas as the starting corners with Cre'Von LeBlanc handing the slot duties. Rookie Avonte Maddox, who has missed the past two games with knee and ankle issues, is listed as questionable for Sunday's game and could mix in at slot corner or safety when he's ready to return.

To replace Mills on the 53-man roster, the Eagles promoted defensive tackle Bruce Hector from the practice squad. An undrafted rookie out of South Florida Hector has bounced back-and-forth between the active roster and PS all season and may be needed against the Cowboys because veteran DT Tim Jernigan is iffy with back spasms.

-John McMullen covers the Eagles and the NFL for 973espn.com. You can reach him at jmcmullen44@gmail.com or on Twitter @JFMcMullen