Brad Keller has experienced a remarkable transformation since joining the Chicago Cubs, most notably a significant increase in his fastball velocity, which has jumped from an average of 93.8 mph last season to nearly 97 mph this year, including a peak of 100 mph. Keller's newfound confidence stems from successful adjustments to his pitching mechanics and a return to health following thoracic outlet syndrome surgery. With a current 2.70 ERA and a career-best strikeout-to-walk ratio of 3.43, Keller’s ability to attack hitters with increased velocity complements his effective slider and sweeper, leading to remarkable performance in high-leverage situations.