Retired pediatric nephrologist Dr. Demetrius Ellis has played sports his entire life: soccer, racquetball, tennis. But a sudden onset of tennis elbow in his 60s prompted his neighbor to introduce Ellis to golf. “I thought it was an extremely expensive sport for rich people who were very compulsive,” Greece-born Ellis laughs. Ellis plays nearly every day at the public course, the Bob O’Connor Golf Course, in Pittsburgh’s Schenley Park.