Boswell was added to the Rockies' 40-man roster Friday.
Boswell's production dipped at the Double-A level in 2019, but he was part of the team's 60-man roster in 2020. His addition to the 40-man roster will protect him from the upcoming Rule 5 draft.
Boswell will be a part of the Rockies' 60-man summer camp.
The 25-year-old infielder is not on the 40-man roster and hit .219/.290/.397 with a 30.2 percent strikeout rate at Double-A last season. He is not a particularly interesting prospect for redraft or dynasty leagues.