bᵻfˌoːɹ ðə stˈɑːɹt ʌvðə sˈiːzən, ˌɔn mˈeɪ twˈɛnti ˈeɪt, tˈuː θˈaʊzənd twˈɛnti wˈʌn, kælˈæspoʊ sˈaɪnd wɪððə wˈɛst vɜːdʒˈɪniə pˈaʊɚɹ ʌvðɪ ɐtlˈæntɪk lˈiːɡ ʌv pɹəfˈɛʃənəl bˈeɪsbɔːl.
Before the start of the season, on May 28, 2021, Callaspo signed with the West Virginia Power of the Atlantic League of Professional Baseball.