PHILADELPHIA (AP) ? Singer Zac Brown has visited a teenager in a hospital who missed the band's latest Philadelphia concert after he was paralyzed in a swimming pool accident. Seventeen-year-old Thomas Schoettle (SHET'-tel) hit his head and injured his neck last month after diving into the pool. He missed Brown's concert Saturday, so Brown flew to Bryn Mawr Rehab Hospital in Malvern and visited him Sunday.