In his early years, Estremera lived in Residencial Las Casas, a large public housing complex located in Santurce, San Juan, Puerto Rico.
[6] According to Ruben Blades, he met Estremera at a venue in Isla Verde (Puerto Rico) in the early 1970s where Celia Cruz, delighted with Estemera's talent brought him onto the stage.
[5] In 1978, Estremera joined Bobby Valentín,[8] among other replacements to Valentin's band -namely Santiago and former Sonora Ponceña singer Luiggi Texidor.
In 2013, Estremera said he felt Puerto Rico was no longer instrumental in keeping the Salsa music genre alive, but that other countries such as Colombia, Perú and Venezuela were.
According to his wife, after Hurricane Maria struck Puerto Rico in September 2017, it became difficult for him to find the medications needed to treat his condition.
After almost a year of his surgery, Estremera was back in Puerto Rico, striving and undergoing physical therapy to regain strength in his legs.
The dual lung transplant performed at Penn Medicine in Philadelphia was called an amazing success,[12] however, during the next two years he would be in and out of hospitals until he died in San Juan, Puerto Rico on October 28, 2020, at age 62.