Maybe his conversation with Favre had something to do with it?
http://sports.espn.go.com/nfl/news/story?id=3645737
Brett Favre, who has started an NFL-record 258 consecutive regular-season games, told ESPN on Tuesday that he called Tony Romo and encouraged him to try to play.
"The only thing I said was, it's worth trying [to play] if you can deal with the pain and can function good enough with a splint,'' Favre said. "If not, don't try.''
Favre has played through a fractured thumb in the past.
After saying he'd try to play, Romo's streak of 30 consecutive starts is now in the hands of Cowboys coaches.