Steve-O was the first celebrity contestant to be judged on his rehearsal footage after being too injured to compete live (from a back injury). The second celebrity judged on rehearsal was Melissa Rycroft, who suffered a rib injury. Both celebrities were in Season 8.
Himself - Host: Throughout the past five seasons, we've had some stars with various physical challenges. Heather Mills had one artificial leg. Kenny Mayne apparently had two.
Season 1: Kelly Monaco with Pro partner Alec MazoSeason 2: Drew Lachey with Pro partner Cheryl BurkeSeason 3: Emmitt Smith with Pro partner Cheryl BurkeSeason 4: Apolo Anton Ohno with Pro partner Julianne HoughSeason 5: Helio Castroneves with Pro partner Julianne HoughSeason 6: Kristi Yamaguchi with Pro partner Mark BallasSeason 7: Brooke Burke with Pro partner Derek HoughSeason 8: Shawn Johnson with Pro partner Mark BallasSeason 9: Donny Osmond with Pro partner Kym JohnsonSeason 10: Nicole Scherzinger with Pro partner Derek HoughSeason 11: Jennifer Grey with Pro partner Derek HoughSeason 12: Hines Ward with Pro partner Kym JohnsonSeason 13: J.R. Martinez with Pro partner Karina SmirnoffSeason 14: Donald Driver with Pro partner Peta MurgatroydSeason 15: Melissa Rycroft with Pro partner Tony DovolaniSeason 16: Kellie Pickler with Pro partner Derek HoughSeason 17: Amber Riley with Pro partner Derek HoughSeason 18: Meryl Davis with Pro partner Maks ChmerkovskiySeason 19: Alfonso Ribeiro with Pro partner Witney Carson