Andrew Luck's injury timetable remains a mystery.
He was later seen on crutches while watching his teammates practice.
A report by CBS-4's Mike Chappell later indicated Kelly injured his foot and will miss "a few weeks".
"We'll adjust", Caldwell said. "These two days against Detroit I think will be a real test against their front line, and we'll get a good gauge for where we are at with the O-line".
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The Zenfone 4 Pro will sport an impressive 5.7-inch AMOLED display, and sport the latest Snapdragon 835 SoC under the hood. There is expected to be a dual camera arrangement in the rear of the Asus ZenFone 4 Pro and a 2x optical zoom feature.
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Fleck said he planned the surprise because the team has a close relationship with the children's hospital and he wanted to create a special memory.
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The foreign minister said the statement was not meant merely to pressure North Korea but to address the issue constructively. Tillerson's top priority has been urging Southeast Asian countries to do more to cut funding streams for North Korea.
The 2016 first-round draft pick came up lame during an 11-on-11 session against the Lions. "I heard (about it) after awhile", he said. But with the influx of outside talent brought into the organization in new general manager Chris Ballard's first year on the job, it seems the Colts aren't willing to wait and see how Langford heals.
Losing Kelly for any length of time would be a major blow to the offensive line. He was one of 11 rookies in the National Football League to start all 16 games a year ago, and joined Steve McKinney, Tarik Glenn, Adam Meadows and Ron Solt as the only Colts rookie linemen to start all 16 games.
With Kelly out, rookie and Warren Central High School grad Deyshawn Bond worked at center with the starting unit.
Veteran Brian Schwenke was signed as a free agent from the Tennessee Titans to compete along the interior and potentially serve as Kelly's primary backup.
Kelly, 24, reportedly suffered a leg injury in practice and had to use a golf cart to get off the field.