WESTFIELD, Ind. -- The boxes have been checked off one by one so far.
Being a full participant when practicing? Check.
Improved timing, strength and recovery periods? Check.
No setbacks? That's the biggest check -- up to this point.
But now Indianapolis Colts quarterback Andrew Luck is about to face his next "milepost" on Thursday at Century Link Field in Seattle (10 p.m. ET). Luck faces the possibility of getting hit in a game for the first time since the final game of the 2016 season. Quarterbacks wear red jerseys in practice and are off-limits from being touched by defenders.