Atlanta signed Heim to a one-year contract Tuesday, Chris Cotillo of MassLive.com reports.
Heim was non-tendered by the Rangers earlier in the offseason after slashing only .213/.271/.332 across 433 plate appearances in 2025, and his defensive metrics have also declined the last two years. Heim does have a good shot to break camp as the backup catcher behind Drake Baldwin while Sean Murphy (hip) recovers.