The memory had already faded for Alex Len, lost among a sea of Comcast Center court-stormers and thumping jubilation. With 0.9 of a second left, he soared through the lane, a 7-foot-1 savior answering Pe’Shon Howard’s air-balled prayer. Minutes later, he was the unwilling provider of a piggy-back ride, carrying multiple Maryland fans until the weight proved too much, and Len toppled to the floor.