Canadian Stacey Gordon and Dominicans Bethania de la Cruz and Annerys Vargas. She replaced the injured Yarimar Rosa. During the regular season, Brenda accumulated statistics that make her Best Libero and Best Digger, and crowned the season winning the Puerto Rico League Championship, sweeping the final series against the Mets de Guaynabo. Castillo then played the 2011 Pan-American Cup being awarded with the Best Libero and Best Digger awards, also winning the silver medal with her national team. She then took part of the 2011 Junior World Championship held in Lima, Peru. She helped her Junior National team to reach the 5th place in the tournament. Brenda won the silver medal and the Best Libero, Best Digger and Best Receiver awards at the 2011 NORCECA Championship, held in Caguas, Puerto Rico. She was also awarded the Best Libero, Best Digger and Best Receiver awards at the 2011 Pan American Games where her team finished in fourth place. Castillo played the 2011 FIVB World Cup and her national team ranked in eight place and she finished in seventh place among the Liberos. 2012 In the Summer Olympics NORCECA qualification tournament played in May in Tijuana, Baja California, Mexico, Castillo saw her team qualify for the 2012 Summer Olympics, winning the gold medal against the Cuban team. She earned awards for the Best Receiver and Best Libero of the competition. Later, she would confessed, that she played the tournament being pregnant and would not be able to play at the Olympic Games. But about one month later, the National Team doctor gynaecologist Albert Fiorinelli Milciades Camilo, announced that Castillo suffered a spontaneous abortion after 19 weeks of pregnancy. Two days later, she predicted that she would start training in 15 days in order to get physically fit to play in the Summer Olympics. At the Pan-American Cup held in Ciudad Juárez, Mexico, she returned to play with the National team, finishing with her team in the 4th place and winning the Best Libero, Best Digger and Best Receiver awards. Castillo played at the 2012 Olympic tournament and her national team ranked 5th, after losing the quarterfinal match 3–0 against the United States. Nonetheless, she managed to win the individual award of Best Libero of the competition. She would later recall, as of July 2016, that award as the peak moment of her career. In September, Castillo won the gold medal and the