The clearest sign that Brock Purdy is a big-time NFL quarterback? We’ve stopped freaking out that Brock Purdy is an NFL quarterback, period. Because he’s not supposed to be one—at least not according to the edified minds who assemble professional North American football teams, who repeatedly passed over Purdy until San Francisco took him, dead last, 262nd overall, the final pick in the 2022 NFL draft. It’s a selection so desultory it comes with a tongue-in-cheek nickname that isn’t really tongue-in-cheek: Mr. Irrelevant. Last year Purdy’s story was: Wow, Mr. Irrelevant is actually starting games as a rookie for the...