
Mark Leiter Jr., 33, was a key player for the Chicago Cubs during the 2024 season, posting a 2-4 record and a 4.21 ERA in 39 appearances. While his earned run average may not appear impressive at first glance, more advanced metrics suggest that his performance was affected by external factors, such as a high .301 BABIP rate, indicating that he may have been a victim of bad luck.