Siemian (shoulder) is listed as questionable for Thursday's contest at San Diego, Mike Klis of 9News Denver reports.
A limited practice participant all week, Siemian is nonetheless on the path to active status in Week 6. If he indeed misses just one game as a result of a sprained AC joint in his left non-throwing shoulder, he'll face off against the Chargers' 27th-ranked pass defense (291.6 yards per game) in Thursday's tilt.