Serven was added to the Rockies' 60-man player pool Wednesday.
Serven advanced to Double-A Hartford in 2019 but experienced some growing pains as he slashed .202/.286/.364 with nine home runs, 30 RBI and 61 strikeouts over 77 games. The Rockies have plenty of catching depth on their major-league roster so it's highly unlikely that the 25-year-old will reach the big leagues this season, but he'll be able to continue his development among some of the organization's top prospects this year.