(Eds: APNewsNow. With AP Photos.) By STEPHEN HAWKINS AP Sports Writer Ryan Cook was playing against the Dallas Cowboys in the preseason finale only a couple of weeks ago.
Now Cook is preparing to start in the middle of the Cowboys' restructured offensive front Sunday at Seattle. He was already snapping to Tony Romo and making line calls only two series into the season opener.
After starting all 16 games at center for the Cowboys last season, Phil Costa dealt with back issues in training camp while two other candidates for the job, Bill Nagy and Kevin Kowalski, both injured ankles.
Costa only got through the first series in the season-opening win at New York before being sidelined again by his back. In went Cook, who had previously only gotten about 10 snaps with Romo in practice before some quick warm-ups on the sideline.
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