Posey, the National League winner, sat out the 2020 season after twin girls adopted by him and his wife were born prematurely. He announced this month he was retiring after 12 seasons. Mancini, who took the American League prize, missed the entire 2020 season while being treated for stage 3 colon cancer. They were selected in balloting by the 30 team beat reporters at MLB.com.
The 34-year-old Posey hit .304 with 18 home runs, 56 RBIs and an .889 OPS for the 107-win Giants. The batting average was his highest since 2017 and the homer total his best since 2015.
Mancini, 29, batted .255 with 21 homers, 71 RBIs and a .758 OPS as a first baseman and designated hitter for Baltimore. He hit his 100th career home run against Toronto on June 20th in his 531st career game, becoming the fastest Oriole to reach the mark after debuting with the team.
He was runner-up to the Mets' Pete Alonso at the All-Star Home Run Derby.