who is the fastest player in rugby union
Carlin Isles Carlin Isles (born November 21, 1989) is an American rugby union and rugby sevens player. Isles plays for the United States national rugby sevens team. Isles had been touted as the fastest rugby player in the world.[1]
Rugby union During the match, players may be replaced (for injury) or substituted (for tactical reasons).[47] A player who has been replaced may not rejoin play unless he was temporarily replaced to have bleeding controlled; a player who has been substituted may return temporarily, to replace a player who has a blood injury or has suffered a concussion, or permanently, if he is replacing a front-row forward.[47] In international matches, eight replacements are allowed; in domestic or cross-border tournaments, at the discretion of the responsible national union(s), the number of replacements may be nominated to a maximum of eight, of whom three must be sufficiently trained and experienced to provide cover for the three front row positions.[47][81]