The Texans have played four different quarterbacks in 2017 and they’ll have a chance to make it five in the season finale. The team announced on Wednesday that they have signed Josh Johnson to their 53-man roster. They are in need of another quarterback with Taylor Heinicke in the concussion protocol. Heinicke played one series against the Steelers on Christmas while T.J. Yates was being checked for a concussion — he was cleared — and suffered his own head injury on a Mike Hilton sack.