"The Lions signed Josh Johnson as quarterback insurance behind Matthew Stafford and David Fales before practice Saturday, in part because of his previous relationship with Lions quarterbacks coach Sean Ryan.Savage suffered a brain injury in the first quarter of the Lions' preseason-opening loss to the New England Patriots on Thursday.Patricia declined to say if swing tackle Tyrell Crosby was in concussion protocol. "And he’s someone that we’re evaluating right now and going through that process. He played college football at Rutgers, Arizona, and Pittsburgh. Crosby was evaluated for a concussion and placed in protocol after Thursday's game. Thomas Benjamin "Tom" Savage is an American football quarterback who is a free agent. QB Tom Savage had trouble standing after being slung to the ground on a sack and … Savage had trouble standing after being slung to the ground on a sack, and was taken immediately to the Lions' locker room.Tom Savage is in concussion protocol for the third time in four years, and Detroit Lions coach Matt Patricia said he's not sure yet how that impacts Savage's timetable for a return.The Lions have two joint practices and play their second preseason game this week against the Texans.Crosby uncharacteristically gave up three sacks in the game, and Patricia declined to say when Crosby suffered his injury.Johnson played for Ryan with the Houston Texans late in the 2017 season, when he was Savage's backup before Savage went on injured reserve with a concussion. "I don’t really comment on those situations," Patricia said Saturday. Detroit Lions QB Tom Savage dealing with third concussion in 4 years. We’ll obviously do everything we can to just do everything that's best for the situation. ""We brought him in, brought a couple guys, worked them out and someone that we thought would really be able to kind of step in mid-stride here and go cause we have a couple competitive days here and then we go to Houston," Patricia said.He played 39 offensive snaps Thursday, tied for most on the team, and played all of the fourth quarter except for the game's final kneel-down snap. We’ll leave it at that. "We go day-by-day with it, and let the people that are trained professionally handle all that. He was drafted by the Houston Texans in the fourth round of the 2014 NFL Draft. "That’s part of the reason I think for us we always obviously evaluate our players after the game and make sure we have injury checks on that stuff," Patricia said.