Complex sentence: During that offseason on January 6,2000, while testing in preparation for the 2000 season, Sam Schmidt suffered a crash at Walt Disney World Speedway that rendered him a quadriplegic, leaving him on a respirator for five weeks.
Split into simpler sentences: During that offseason, while testing in preparation for the 2000 season, Sam Schmidt suffered a horrendous crash at Walt Disney World Speedway on January 6,2000. The accident rendered him a quadriplegic, and on a respirator for five weeks.