You need to watch more Rajon Rondo. Maybe you already watch Rondo; maybe you've watched him for years; maybe you're trapped under a sheet of ice in the NHL playoffs. But something stirring is happening with the Boston Celtics point guard. Rondo, 26, has been an elite player in the NBA for a few years; he's already won a championship ring; but lately, he's been pushing into a level of virtuosity that's new and rare and wildly entertaining. The triple-doubles and funny-number stat sheets are accumulating (Rondo closed the season with 24 straight games with 10 or more assists) but his quirky talent must be witnessed to be...