The Tigers released left-hander Sean Guenther after an injury-hit 2026 season, making the former bullpen contributor a free agent. The Detroit Tigers on Friday released left-handed reliever Sean Guenther, according to his MLB.com transaction log, ending his second run with the organization. Guenther had spent most of the 2026 season on the minor league injured list after last pitching in early May. After returning from injury, Guenther worked his way back through the minors before the Tigers selected his contract in August 2024. Article Continues BelowHis production declined in 2025, when he products a 5.23 ERA in 10 1/3 major league innings and a 5.63 ERA over eight innings in the minors.