Paul Casey leads by two strokes after the second round of the Texas Open . Goydos cards six shots for five - under - par 65 to get to 12-under after 36 holes . Mathias Gronberg led a Swedish charge in San Antonio , opening the day on four-under and going one better with a second-round 65 to take a share of the clubhouse lead with Leonard on nine-under . Joint first round with Justin Leonard among quintet to take second place .
Paul Casey leads by two strokes after the second round of the Texas Open . Goydos cards six shots for five - under - par 65 to get to 12-under after 36 holes . Joint first round with Justin Leonard among quintet to take second place .