SAN ANTONIO—Loyola-Chicago led Michigan by 10 points early in the second half of Saturday night’s national men’s basketball semifinal. For a few shining minutes, it looked like the No. 11-seed Ramblers might become the lowest-seeded team ever to reach the national championship game.
But then charmingly undersized Loyola-Chicago ran into a 6-foot-11 German who is very good at basketball. Michigan’s Moritz Wagner, a junior from Berlin who speaks fluent offense, finished with 24 points and 15 rebounds. He propelled the Wolverines...