Yes, Dear - Season 3 Episode 16 Hustlin' Hughes

Jimmy seeks to put a stop to Big Jimmy's lies that he coached Johnny Bench and other baseball legends in the minor leagues, because Dominic believes him the same way he did when he was a child. Remembering how upset he was when he learned the truth at 13, Jimmy confronts his father, calling him on his lies. Even though there's no record of Big Jimmy having coached anywhere -- and there never was a uniform stored in the Hughes' attic like he said there was -- Big Jimmy insists he's telling the truth. Jimmy takes Greg and Dominic to a baseball card convention, where Greg calls his mother to blast her for throwing out his now-valuable collection and Jimmy tries to undo all the coaching tips Big Jimmy gave Dominic. Greg bumps into Johnny Bench, and learns straight from the source that Big Jimmy coached him in Buffalo, after all. Jimmy has to eat crow when Greg introduces him to Johnny, who in turn introduces them both to Ernie Banks and Frank Robinson, both of whom Big Jimmy coached, too.