Mezue ahịrịokwu na-esonụ: N'egwuregwu 2004, Beltrán jikọtara Barry Bonds 'otu oge post-oge ndekọ na asatọ home runs. Ọ gbara otu n'ime egwuregwu anọ mbụ nke asọmpi ahụ.
National League Championship Series (NLCS) megide St. Louis Cardinals, gụnyere onye mmeri egwuregwu na Egwuregwu 4. Na-agụta arụmọrụ ụlọ ya abụọ na Egwuregwu 5 nke agba nke ikpeazụ na National League Division Series (NLDS) megide Atlanta Braves, Beltrán kụrụ ọ dịkarịa ala otu ụlọ na egwuregwu ise na-esote egwuregwu postseason, nke naanị Daniel Murphy na-agba n'ụlọ na egwuregwu isii na-esote na 2015. N'egwuregwu iri na abụọ na 2004 playoffs, Beltrán batara.435 na 14 RBIs na 21 gbara ọsọ.