And here's the new commercial. It's interesting to note that much of it centers on Canelo Alvarez, the young Mexican light middleweight WBC champion. Well-known in boxing circles and his home country, he's yet to make a huge impact in the United States. But he fits the upstart, underdog image that Plank has cultivated (and reaches into markets into which the company would like to continue expanding). That's also why Sloane Stevens, the only ranked teenager in pro tennis, appears. Baseball player Bryce Harper is, by now, a mainstream force, and basketball star Kemba Walker is still remembered for leading Connecticut to a national championship in 2011. So it's an interesting mix of endorsers. All, though, appear in rustic, simple training settings -- augmented, of course, by Under Armour technology.