The Colts are likely to be without Andrew Luck on Sunday against the Jaguars, CBS Sports NFL Insider Jason La Canfora reported Sunday on The NFL Today.
Luck either missed practice throughout the week or was limited in practice with a right shoulder injury leading to intense concern about the quarterbacks' health.
There is indeed "serious concern" about Luck who was considered "legitimately questionable" for this game earlier in the week.
"There is serious concern about Andrew Luck's shoulder in Indianapolis," La Canfora reported.