Added to Roster
John has been added to the Clayton Valley Charter 2017 water polo roster.John has been added to the Clayton Valley Charter 2017 water polo roster.Apps
MaxPrepsFollow your favorite high school teams and players
MP Stats for iPadStat keeping for basketball teams
Pro Photography
Watch
Video CenterSee top plays & highlights of the best high school sports
Live Streams & ReplaysGet access to live game streams and full replays for 8000+ schools
Content Contributors
Tickets
John Blatter
- John has been added to the Clayton Valley Charter 2017 water polo roster.
Added to Roster
John has been added to the Clayton Valley Charter 2016 water polo roster.
John Blatter's Bio
View Full Bio
Recent Water Polo Games
Clayton Valley Charter 
© 2026 MaxPreps, Inc.
MaxPreps is a registered trademark of MaxPreps, Inc.