Pagés was drafted by the St. Louis Cardinals in the sixth round, with the 185th overall selection, of the 2019 Major League Baseball draft.[2] He made his professional debut with the Low–A State College Spikes, hitting .291 with two home runs and 21 RBI in 50 games. Pagés did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[3]
He returned to action in 2021 with the High—A Peoria Chiefs, playing in 80 games and batting .249/.337/.385 with nine home runs and 39 RBI.[4] Pagés split the 2022 season between the Double–A Springfield Cardinals and Triple–A Memphis Redbirds. In 86 games for the two affiliates, he hit a cumulative .227/.312/.381 with 10 home runs and 44 RBI.[5]
Pagés spent the 2023 campaign with Double–A Springfield, compiling a .267/.362/.443 batting line with career–highs in home runs (16) and RBI (72) across 117 games. On November 14, 2023, the Cardinals added Pagés to their 40-man roster to protect him from the Rule 5 draft.[6]
Pagés was optioned to the Triple–A Memphis Redbirds to begin the 2024 season.[7] On April 4, 2024, Matt Carpenter was placed on the 10 day injured list, resulting in Pages being promoted to the major leagues for the first time.[8] He made his MLB debut on April 7 as a pinch hitter.[9] On April 11, Pagés was sent down, but just 10 days later he was called back up. This was a corresponding move as Victor Scott II was optioned to Triple–A. On April 30, Pagés hit a sacrifice fly for his first run batted in.[10] His first career hit came on May 14, in a key at-bat with the bases full in the third inning against the Los Angeles Angels at Angel Stadium. Pagés hit a double that drove in all three runners as part of a 7-6 victory.[11]His first career home run was a go ahead homer against the Chicago Cubs.