According to Philadelphia Eagles defensive coordinator Billy Davis, starting inside linebacker Mychal Kendricks has been ruled day-to-day with a calf injury. Head coach Chip Kelly noted on Monday that Kendricks underwent MRI testing.

Kendricks left the Eagles-Colts game late in the third quarter after visibly suffering an injury. Kendricks didn't have to be carted off the field but he appeared to be walking gingerly back to the locker room. Kendricks didn't return to the field but he was seen in the locker room after the game. Kendricks informed the media that he only suffered a calf spasm. He also added that he should be fine. Now it seems a little less certain.

It certainly wouldn't be good for Philadelphia if Kendricks can't play. The Eagles are already thin at inside linebacker due to a season-ending pectoral injury that top backup linebacker Najee Goode suffered in Week 1. If Kendricks can't play, the much-maligned Casey Matthews or Emmanuel Acho will have to start in his place. Davis said he doesn't see much of a difference between Matthews or Acho.

It appears Kendricks will not practice today, Wednesday.

Kendricks walking gingerly out to practice. He's not going, obviously. #Eagles — Martin Frank (@Mfranknfl) September 17, 2014

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In potentially more positive news, it appears rookie wide receiver Josh Huff (shoulder) and second-year offensive guard Matt Tobin (ankle) have returned to practice. Both players have missed the first two weeks of the season due to injury.

Huff was seen working with the third team in practice. Tobin was seen lining up as the second team left guard.