Melvin (knee) has been working as the backup at left corner with rookie Quincy Wilson sidelined with a foot injury, according to the team's official web site.
The Colts have gone out of their way to avoiding providing a timeline for Luck's (shoulder) return to practice, The Indianapolis Star's Stephen Holder reports.
Butler (head) could move back to corner in 2017, Kevin Bowen of the Colts' official site reports.
Position: Running Back
Gore did not report to practice Tuesday for personal reasons, Mike Chappell of Indysportscentral.com reports.
Position: Offensive Tackle
Mewhort (knee) did not practice Tuesday, George Bremer of The Herald Bulletin reports.
Wilson was held out of Tuesday's practice with a foot injury, George Bremer of The Herald Bulletin reports.