SPRINGFIELD, Mo. (AP) — Bobby Petrino, a coach with a track record of on-the-field success and off-the-field embarrassments, will be the next coach at Missouri State. The Springfield-based university said Wednesday that Petrino, 58, will be introduced at a news conference Thursday. He will replace Dave Steckel, who was fired last week after winning just 13 games in five seasons. Petrino has a…