Texans wide receiver Andre Johnson has a lung contusion and is listed as day-to-day for Sunday's game against Buffalo, coach Gary Kubiak said Monday.
Johnson will undergo tests throughout the week before a decision is made on his availability.
"We're fortunate here," Kubiak said.
Johnson left Sunday's game against San Francisco in the fourth quarter and was taken to a hospital for X-rays. He fell on the ball, coughed up blood and went to the sideline.
Johnson had a 44-yard reception on what proved to be the Texans' winning field goal drive late in the fourth quarter