Yes he did and he lost.
yes at bragging rights 2010, the nexus helped Kane bury the undertaker into the ground.
After receiving a concussion and facial fracture in a match with Rey Mysterio, Undertaker was out of action from May 28 2010 to October 24, 2010. He had returned August 15, 2010 for SummerSlam, but had a scripted exit (attacked by Kane) before he could compete. He then lost to Kane again at Bragging Rights on October 24.
the undertaker is going to return in 2010 because Kane and the nxus burid the dead man the undertaker and
WWE Bragging Rights - 2010 TV was released on: USA: 24 October 2010 Japan: 4 November 2010
They never gave a specific reason. Maybe they just wanted him out of the way, the way they did John Cena.
WWE Bragging Rights - 2010 TV is rated/received certificates of: Australia:M USA:TV-PG
it was bragging rights 2010 versus Kane i would rate his performance 6/10 but his whole career 10/10