What's been the matter with Mike McGlinchey? 49ers' right tackle explains FacebookTwitterEmail 1of3 Mike McGlinchey’s head held game plans and self-defeating thoughts at the same time.Jennifer Stewart / Associated PressShow MoreShow Less 2of3 GLENDALE, ARIZONA - DECEMBER 26: Quarterback C.J. Beathard #3 of the San Francisco 49ers celebrates with Mike McGlinchey #69after throwing a touchdown pass against the Arizona Cardinals during the fourth quarter of the NFL game at State Farm Stadium on December 26, 2020 in Glendale, Arizona. The 49ers defeated the Cardinals 20-12. (Photo by Christian Petersen/Getty Images)Christian Petersen / Getty ImagesShow MoreShow Less 3of3 It was worry. That’s the self-assessment of the 49ers’ mildly embattled right tackle, who spoke from the heart Thursday about self-defeating thoughts that have swum in his head this season.