Mark Bowman of MLB.com reports that the Braves are expected to announce a contract extension with Craig Kimbrel soon. It's the winter of extensions for the Braves, as they've already locked up Freddie Freeman and Julio Teheran to long-term deal. The specifics of Kimbrel's extension are not yet known. Kimbrel, who is arbitration-eligible for the first time this offseason, holds a microscopic 1.39 ERA with 381 strikeouts across 227 1/3 innings in his first four seasons in the majors.