Johnson said he's day-to-day with an unspecified injury, Chris Adamski of TribLive.com reports.
After dealing with a hip injury early in training camp, Johnson made it back for the second week of the preseason, catching three of five targets for 46 yards and a touchdown while playing deep into the fourth quarter. The rookie third-round pick doesn't appear headed for a significant Week 1 role on offense, but he could get chances throughout the year if Donte Moncrief and/or James Washington disappoint. An absence from Saturday's preseason game against Tennessee wouldn't help Johnson's case.