Like JB said, it was not a McNair quote. He would never let us see that much into his organization.
Now let's look at an article after the Brock signing, which clearly reveals that not only was O'Brien on board with it, but he was also an advocate:
After the Texans' 30-0 loss to Kansas City in the playoffs, O'Brien took off a couple of days before returning to the film room. First, he evaluated each of the Texans. Then, he turned to prospective free agents and watched tape before filing his report with Smith.
When O'Brien finished, Osweiler was at the top of his list of quarterbacks.
"We study all these guys," O'Brien said. "We watch their (regular-season) tape (and) their preseason tape. When you threw the tape on from (last season), it was impressive. He played in some very tough games, some very meaningful games.
"It's not easy to be a starting quarterback in this league. It's one of the most difficult things in sports to do. I think we got the right guy." ~ Source: Osweiler acquisition began in film room, ended with Texans sparing no expense
Bill O'Brien said it right there: "
I think we got the right guy.'
But, please continue reading, because it just continues to confirm that O'Brien was right there with Smith in getting Brock:
To make sure they were on the same page, Smith and O'Brien went to the film room and watched hours of tape on the 6-8, 240-pound Osweiler.
"We came out of the film room agreeing that Brock Osweiler was the quarterback to lead us where we want to go," Smith said.
Do you need more quotes from O'Brien's mouth? Because they are not hard to find. This took me about 45 seconds with a Google news search.
Here's another one:
NFL.com:
What made Bill O'Brien fall for Brock Osweiler?
The Texans pounced on Osweiler only after an extensive review of every available quarterback, with O'Brien saying the team "spent a lot of time studying a lot of different guys, college guys, pro guys," but felt like "Brock gave us the best chance to win."