Mark (born Mark Michael Brzezicki, 21 June 1957, Slough, Berkshire, England) is a rock drummer, who is primarily known for his work with Big Country, and is a former member of the groups The Cult, Ultravox, and Procol Harum.

He has also played with Pete Townshend, Roger Daltrey, Midge Ure, Fish, The Pretenders and many others. He uses both the traditional and matched grips.

With Tony Butler (of Big Country) he was known as Rhythm for Hire. Brzezicki left Big Country in July 1989, but rejoined in 1993. Big Country started gigging again in 2007, as part of their 25th anniversary tour.

In 2004, Brzezicki helped found a new band, Casbah Club, with Bruce Foxton and Simon Townshend. Smash Hits magazine had a running gag in the 1980s wherein they referred to him as "Mark Unpronounceablename of Big Country". On Pete Townshend's All the Best Cowboys Have Chinese Eyes and White City: A Novel albums there are joking references to the spelling of his last name.