Cubs officially release Alfonso Rivas

Alfonso Rivas drives in 5 as Cubs pound Pirates 21-0

Padres pregame: Manny Machado returns, pre/postgame show talk, Alfonso Rivas arrives - The San Diego Union-Tribune

Cubs claim Anthony Kay off waivers from Blue Jays — Canadian Baseball Network

In latest of '21 Cub debuts: Rivas shines, Effross struggles

Frank Schwindel's dream moment comes up just short for the Cubs

Alfonso Rivas 2022 Topps Chrome Rookie Auto - Green Refractor #RA-AR Price Guide - Sports Card Investor

State of Cubs' 40-man roster with offseason moves – NBC Sports Chicago

Cubs call up Alfonso Rivas, an intriguing 1B prospect – NBC Sports Chicago

2021 season ends prematurely for promising Cubs rookie Alfonso Rivas - Marquee Sports Network