UFC Fight Night: dos Anjos vs. Lee was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on May 18, 2019 at Blue Cross Arena in Rochester, New York.

Blue Cross Arena, also known as the War Memorial, is a multi-purpose indoor arena located in Rochester, New York. For hockey and lacrosse, its seating capacity is 10,662. The arena opened on October 18, 1955, as the Rochester Community War Memorial. It was renovated in the mid-1990s and reopened as The Blue Cross Arena at the War Memorial, on September 18, 1998. It is home to the Rochester Americans of the American Hockey League and the Rochester Knighthawks of the National Lacrosse League.