It's a smart move for O'Brien, and the ambiguity advantage likely outweighs the splitting of his own reps in practice. Why give up information until forced?
However, NFL Media Insider Ian Rapoport reported Friday that the team expected to start Keenum, per two sources informed of the Texans' plans.
"Just talking to sources involved in the situation it seems that Case Keenum -- who just a couple days ago was on the Rams' practice squad after being cut by the Texans early in the year -- it seems he is the favorite to start over Thad Lewis, who was brought in mid-year," Rapoport said on NFL Network's NFL AM.
The reasons for going with Keenum are simple: He is more familiar with the totality of the offense having played in it during the preseason and he knows the staff. He also has more upside at this stage than Lewis and would likely be a better option to exploit a shaky Ravens secondary.
Still it's always difficult to start a quarterback less than a week after he rejoins a team. While at this point the Texans are leaning toward Keenum, O'Brien is going to play this one close to the vest.