SAN DIEGO, Calif. - Nine months after finishing runner-up at the U.S. Open, Matthew Wolff returned in style from a mental health break, shooting one-under-par 70 in the opening round at the national championship at Torrey Pines on Thursday. Wolff has already won more than $5 million in two years as a professional, but the money was of little consolation as he found himself in a bad place while plying his trade on the PGA Tour earlier this year. Suddenly bereft of form