Arizona Diamondbacks manager Torey Lovullo apologised to the Chicago Cubs after Major League Baseball said the Cubs had not broken rules by having third-base coach Quintin Berry relay signs during a game. The dispute highlighted the distinction between permitted on-field sign stealing and the prohibited use of technology to decode and transmit signs.

Arizona believed Berry was reading pitcher Merrill Kelly’s signals during Chicago’s 7–0 win on Monday, prompting a heated exchange between the dugouts. Kelly called a coach relaying signs “bush league”, but MLB told Lovullo that base coaches may do so while remaining within their coaching boxes; Lovullo then contacted Cubs manager Craig Counsell to apologise.