Velasco started his wrestling career in 1937 after having trained for two years under the tutelage of Raúl Romero, using the name "Telmo Velazco". Because Velasco did not have the physical size to become a top line wrestler, he was never a main eventer, but because of his skills and tenacity he was a respected mid-card wrestler who could be relied on to put on a good match.
In 1937, Velasco embarked on his wrestling journey after two years of training under Raúl Romero, adopting the moniker "Telmo Velazco". His compact frame hindered his potential for main event stardom, but his expertise and perseverance earned him a reputation as a reliable and engaging mid-card performer.