- Developed 52 Texas high school State (UIL) gold medalists.
- Coached over 285 high school All-Americans.
- USA Olympic Trials qualifiers in 1984, 1988, 1992, 1996 and 2000.
- Produced 6 Olympians in three different sports (swimming, triathlon and pentathlon).
- Olympic swimmers from 3 different countries (USA, Nicaragua and Algeria)
Coach George Block retired from the Northside Independent School District in San Antonio, Texas at the end of June 2009, where he served as the Director of Aquatics since 1977 and Assistant Director of Athletics since 1993. In that time, he developed the Northside Aquatic Center into an internationally recognized center for athlete development.
In 1987, USA Swimming awarded him the Phillips 66 Performance Award. In 1992, Coach Block was the Coca-Cola Texas Coach of Honor. In 1997, the United States Water Fitness Association named the Northside Aquatics Center the Top School District/Community Facility in the nation and Coach Block its Top Aquatics Director. From 1997-98, Coach Block served as president of the American Swimming Coaches Association (ASCA) and in 2000 was awarded the Silver Award of Excellence for 20 years of USA Swimming National finalists. He served as Vice-President of USA Swimming from 2006-2010 and is currently President of the World Swimming Coaches Association.
Also heavily involved in his local community, Coach Block was one of the founders of the San Antonio Sports Foundation and of Voices for Children-San Antonio, an early childhood advocacy organization of which he has since been Chairman of the Board.