Six weeks into the 2025-26 MLB offseason, the Arizona Diamondbacks have crossed the No. 1 item off their to-do list: improve the rotation. The D-backs imported Michael Soroka and brought back Merrill Kelly to strengthen a rotation that will not have Corbin Burnes to begin 2026 as he completes his Tommy John surgery rehab. Kelly and Soroka will join holdovers Ryne Nelson, Brandon Pfaadt, and Eduardo Rodriguez in the starting five. Yilber Díaz and Cristian Mena loom as depth options. "We're in both (the trade and free agent) markets now," GM Mike Hazen told reporters, including MLB.com, when asked what his team's next move would be after signing Soroka. "So it could come in either one of...