What happened: Aaron Bummer has opted out of his contract with the Chicago Cubs and is now a free agent, per Jon Heyman. The move removes him from Chicago's bullpen mix immediately.
Why it matters: The Cubs lose a relief arm just as the trade deadline approaches, adding pressure to address the bullpen from outside the organization. Chicago enters the stretch at 48-42 on a two-game winning streak, keeping the roster crunch timely.
By the numbers: Chicago Cubs: 48-42 this season, scoring 4.9 runs per game and allowing 4.5, on a two-game winning streak.
What to watch: Watch whether the Cubs pursue bullpen help before the Aug. 3 trade deadline.