The Houston Chronicle reported Johnson was unavailable for postgame interviews because of the NFL's concussion protocol.
The injury occurred after Johnson absorbed a hit from Titans safety Bernard Pollard. The play initially was ruled as an incomplete pass but was overturned to a catch after Kubiak tossed his red challenge flag. The reception moved the Texans to the Titans' 2-yard line and set up a late touchdown and two-point conversion to tie the score.
Johnson finished with eight catches for 76 yards.