- He played as a center half (a kind of defensive midfielder of the time) and despite his small stature, he was able to perform efficiently in that position based on skill and cunning.

- "This kid, 'Titina,' is a tiny little player. Every advance initiated by the 'Cold' players ended up with this center half, who was a true wall [...] His passes were delivered with mathematical precision, and he grew in stature with every intervention. He was the highlight of the Buenos Aires team and also the best man on the field."

- For the Pinks, he started as a right half, as the starting center half was César Larrea, who had occupied that position since the Third Division.

- He played as a center midfielder, but he wasn't a defensive midfielder. Rather, he was a brilliant player with modern characteristics for the era in which he played. That is to say, as a midfielder, he scored and created goals, providing assists for the forwards, what is now known as a mixed midfielder. A rare find for his time, Titina was a skilled, creative midfielder with a great range of play who shone for two decades, the 1930s and 1940s.

- Titina was also a shining star for Peru, participating in the 1936 Olympic Games and the 1937 Copa América (where he achieved continental recognition and was voted the best South American midfielder of the era), and winning the 1938 Bolivarian Games and the 1939 Copa América. A genius and a figure, he was an idol for virtually every club he played for and one of the best players to ever wear the Peruvian national team.

- He started out at Unión Buenos in the Callao League, where he began to stand out for his creative play and his marking ability.

- Considered by many to be the best Peruvian midfielder of all time.

- He was a virtuoso with the ball and pioneered a style that always characterized Peruvian football: touch, skill, and creation in midfield.

- His international breakthrough came in 1937 at the South American Night Championships in Buenos Aires, where he was hailed as the tournament's best midfielder, overshadowing two greats of the era: the Argentine Minella and the Brazilian Brandao.

- Because he was possibly the first great modern midfielder in Peruvian football, with an unusual back-and-forth approach for his time.

- He was an organizing midfielder with great back-and-forth ability, enormous technical skill, and an excellent passer who debuted in the First Division with Sport Boys.

- "Center-half Castillo towered over two well-known figures on our fields: Zozaya and Minella. It seemed impossible that, being so short, he could keep out Don Padilla's headers in front of his own goal. The expressions in the stands were never more fitting. Castillo grew."

Links:
https://elbauldelamisilera.blogspot.com ... itina.html
https://wikisba.fandom.com/wiki/Segundo_Castillo
https://es.wikipedia.org/wiki/Segundo_Castillo_Varela
https://web.archive.org/web/20090903043 ... stillo.asp
https://dechalaca.com/especiales-dechal ... o-tri-tina
https://glavisted.blogspot.com/2012/08/ ... -peru.html
https://lahistoriadeuniversitariodedepo ... itina.html