Disney XD has teamed with ESPN to uncover sports' biggest myths and mysteries, in the series "Disney XD ESPN Sport Science," which premieres at 11 a.m. Saturday, Sept. 29, on Disney XD. Hosted by John Brenkus and Leo Howard, black belt martial artist and star of Disney XD's hit series "Kickin' It," the short-form series brings together pro athletes in scientific facilities to test the limits of human athletic abilities.

Combining the best segments of ESPN's Emmy Award-winning series "ESPN Sport Science," each episode will feature three segments with Brenkus and Howard using scientific experiments to test topics, including laws of gravity, momentum, size, speed, skill and stamina.

The series features appearances by NBA stars Dwight Howard (Los Angeles Lakers) and JaVale McGee (Denver Nuggets); NFL stars Vernon Davis (San Francisco 49ers), Larry Fitzgerald (Arizona Cardinals), Jahvid Best (Detroit Lions) and Brandon Jacobs (San Francisco 49ers); former MLB star and current ESPN analyst Nomar Garciaparra; soccer star Zach Thornton; snowboarders Shaun White and Sage Kotsenburg; skateboarder Bob Burnquist; skier Simon Dumont; Olympic softball player Danielle Lawrie and NCAA basketball player Brittney Griner (Baylor Lady Bears).