DUBLIN, Ohio — At 21, Jordan Spieth is younger than a few of the golfers on the Louisiana State and University of Southern California teams that squared off Wednesday in the N.C.A.A. Division I match-play final. Spieth, one of the marquee players in this week’s Memorial Tournament, is the closest pursuer to the world No. 1, Rory McIlroy, who last month turned 26, leading Jack Nicklaus, the Memorial host and 18-time major champion, to observe, “The game of golf is in pretty good hands.”
That is one way of framing it. But a quick look at a photograph of the extended Nicklaus clan reveals a different picture.