The term 'RUTH's Surpasser' refers to the legendary baseball player, Babe RUTH. He was known for his incredible hitting ability and is widely considered to be one of the greatest players in the history of the sport. The crossword solution for this term is MARIS, which is the last name of another great baseball player, Roger Maris. Maris famously broke RUTH's single-season home run record in 1961, thus earning him the nickname 'RUTH's Surpasser'.