Mark Kelley has performed with Houston Grand Opera in Adriana Lecouvreur and Die Meistersinger von Nürnberg.

In concert, he has performed as soloist in Beethoven's Chorale Fantasy with the Houston Symphony. He can be heard on a variety of recordings, including the soundtracks for the motion picture Heartbreakers, Forget Me Not - The Anne Frank Story, Pardon My English, Rod Stewart's Rhythm of the Heart, A Gift of Hope and A Gift of Love.