Disney XD has teamed with ESPN to uncover sports' biggest myths and mysteries in the series "Disney XD ESPN Sport Science," premiering Saturday at 11 a.m. 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 state-of-the-art scientific facilities to test the limits of human athletic abilities.

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

In the premiere episode, "Full Contact, MLB Vision, Flips & Spins," hosts Brenkus and Howard test the impact of a 300-pound heavy bag and showcase how San Francisco's Davis manages incoming forces to block, catch and run; Howard tries to hit a 90 mph fastball and MLB batting champ Garciaparra tests the reality of keeping an eye on the ball; Howard tries on special eye tracker glasses and investigates how freestyle skier Dumont keeps track of which end is up while flipping in the air.