Henry Armstrong Miller (born July 16, 1969) is a former sumo wrestler, raised in St. Louis, Missouri, who competed under the shikona Sentoryū Henri (戦闘竜 扁利). The first wrestler from the US mainland to reach the top makuuchi division, he made his professional debut in 1988 and reached a highest rank of maegashira 12 before retiring in 2003. He last competed in MMA as recently as 2013, losing to Kazuhiro Nakamura.