The Pirates selected Brannigan's (shoulder) contract from Double-A Altoona on Tuesday, Alex Stumpf of MLB.com reports.
Brannigan slashed .225/.329/.358 across 237 plate appearances at Double-A Altoona in 2025 before suffering a shoulder injury in June that required season-ending surgery. The 24-year-old infielder will join Pittsburgh's 40-man roster to ensure he remains with the organization past the Rule 5 Draft in December, though he shouldn't be expected to appear in the big leagues in 2026.