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In page David Wagner (tennis):

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Wagner was born in Fullerton, California,[1] and grew up in Walla Walla, Washington.[2] He played basketball in high school and tennis in college. He became a quadriplegic at age 21 while visiting a friend in Redondo Beach, California, during summer break. He and his friends were playing frisbee on the beach and Wagner began chasing after the frisbee through shallow water. He attempted to jump over a wave, but the wave caught his feet, spun him around, and he landed head-first in the sand, leaving him paralyzed.[3] He took a year off of college and began practicing table tennis as part of his rehabilitation. He won a national competition in that sport three years in a row, from 1997 to 1999.[2]