Won a silver medal with Team USA at the Tokyo 2020 Olympic Games, starting every game at second base for the red, white, and blue. Finished the tournament hitting .250 (6-for-24) with two doubles and four runs scored. He opened the scoring in the first game of the Olympic Games Tokyo 2020 with an RBI-double in the third inning and finished the game against Israel 2-for-5 with two doubles, two RBIs, and scoring two runs. Alvarez went 1-for-3 with a run scored against Korea, 1-for-4 with a run-scored against Japan in the quarterfinals, and 1-for-4 with an RBI-single from the leadoff spot against Korea in the semifinals, bringing in a run in the five-run sixth inning that pushed the U.S. into the gold medal game. Went 1-for-3 batting leadoff for the stars and stripes in the gold medal game against Japan.

In addition to being named the male Flag Bearer for Team USA at the Opening Ceremonies, Alvarez was also named to the All-Olympic Team (second base). By securing the silver medal, Alvarez became just the sixth athlete all-time to win an Olympic medal in both the Summer and Winter Games. He is the third American athlete to do so, following Eddie Egan (1920, 1932) and Lauryn Williams (2004, 2012, 2014).

2021 Qualifier: Alvarez made three starts on Team USA’s infield at the WBSC Baseball Americas Qualifier, hitting .273 with a .429 on-base percentage. He came off the bench to draw a walk and score a run to go along with a run-saving catch at second base in Team USA’s 7-1 victory over Nicaragua to open the AOQ. The infielder recorded a pair of doubles in Team USA’s 8-6 win over the Dominican Republic that clinched a spot in the AOQ Super Round for the U.S. Alvarez drove in a critical run in Team USA’s 10-1 win over Canada with a sixth-inning triple that extended the U.S. lead to two runs.