The NFL is asking the Atlanta Falcons when they knew running back Bijan Robinson wasn't physically well ahead of Week 7 and why it wasn't reported per league policy, according to a source.

It is standard practice for the league to question teams about a player if he is not included on the weekly injury report and then is either unavailable for the game or plays far less than expected.

Robinson did not enter Sunday's game against the Tampa Bay Buccaneers until two minutes remained in the first quarter. Arthur Smith told FOX at halftime that Robinson wasn't feeling well.

Robinson said after the game that he was suffering from headaches and began "feeling weird" on Saturday night, when he struggled to sleep and woke up "feeling completely out of it."

He said he took medicine to try to feel better, but his head continued to hurt.

The Falcons believed Robinson always was going to play the game and therefore did not need to be added to the injury report, according to a report.