Steven Luevano was tested in his 3rd defense against Mario Santiago on the David Diaz-Manny Pacquiao undercard at Mandalay Bay Events Center on June 28 , 2008 .
Manny Pacquiao was tested in his 3rd defense against David Diaz on the Steven Luevano-Mario Santiago undercard at Mandalay Bay Events Center on June 28 , 2008 .