Los Angeles Chargers receiver Keenan Allen suffers setback in recovery from hamstring injury

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While the rest of his teammates should come back from a bye week refreshed, Los Angeles Chargers wide receiver Keenan Allen is feeling anything but.

Allen, who has only suited up for two of his team's seven games this season, experienced a setback with his injured left hamstring during a training session and may not be healthy enough to play on Sunday against the Atlanta Falcons.

''I don't think it was a re-strain or anything. Just some more scar tissue is trying to break off,'' Allen said. ''Whenever it's ready to heal, just let it do its own thing.''

Allen injured his hamstring in the season opener and missed the next five games before returning for a Week 7 matchup against the Seattle Seahawks. He played 23 first-half snaps against the Seahawks and finished with two catches for 11 yards.

''I felt great. It wasn't like training camp,'' said Allen on how he felt during the game. ''I definitely felt ready to play.''

After missing practice on Monday and Wednesday, Allen is questionable for Sunday. He wouldn’t put a timetable on his return but said that he did not want to come back until there was absolute certainty in his health.

"I definitely don’t want to do the halfway thing again," he said. "Just want to come back 100 percent and not be worried about it."

Allen’s absence Sunday would loom even larger because the Chargers could be without receivers Mike Williams (ankle) and Joshua Palmer (concussion protocol).

With all the injuries to receivers, Austin Ekeler leads NFL running backs with 53 receptions. It is only the third time a running back has at least 50 catches through his team's first seven games.