Díaz Chapell, P.A., Vázquez Alfonso, Y., Batista Sotolongo, C. and Velasteguí López, P. 2019. The importance of the first strike to have a good performance and a good effectiveness in the starting pitchers and relays of the youth category. ConcienciaDigital. 2, 4 (Oct. 2019), 78-86. DOI:https://doi.org/10.33262/concienciadigital.v2i4.1015.