Bolton was reassigned to minor-league camp by Pittsburgh on Tuesday.
In his first full season since 2019, Bolton spent all of 2022 in Triple-A and put up a solid 3.09 ERA and 1.29 WHIP with 82 strikeouts through 75.2 frames. If the 24-year-old reliever is able to maintain those numbers, there's a chance he makes his major-league debut at some point this year.