Trying to predict injuries in the NFL is pretty much impossible on a single specific player basis. The most obvious reason for that is the data. All thats really available for someone to try and model this is injury reports and time missed. Both are basically useless on a scientific basis.
Injury reports simply arent reliable. Most teams actually use them as a tactical tool and I dont blame them, why would I tell you exactly where each of my players are hurt and why wouldnt I use it to actually steer you in the wrong direction?
Games missed dont tell you a whole lot either... Outside of maybe 10 QBs from year to year, teams handle the starter's injury from alot of different perspectives depending on a variety of situational elements. Tannehill missed a whole lot of time because of a personal decision that might have not been the best course of action in hindsight for example. Tua didnt start the Ravens game because he was too hurt to play but...
And I have no idea if Tua is going to get hurt or not, but I will tell you guys this, if you're going to put money or your fantasy team draft strategy at play trying to model injuries, dont ever use this type of forecasting. The right thing to do here is take the league average and just weigh it down slightly when a player has a big injury history.