David Robertson, a key member of the Texas Rangers' bullpen, has opted out of his mutual option and is now a free agent. The 39-year-old right-hander had a solid season, appearing in 68 games with a 3.00 ERA and 99 strikeouts over 72 innings.

Robertson's decision comes as the Rangers look to rebuild their bullpen, with fellow reliever Kirby Yates also facing free agency. The team is expected to prioritize strengthening their late-inning options during the offseason.