Eh.. "The pilots landed the airliner on a narrow grass levee at NASA's Michoud Assembly Facility in the Michoud area of eastern New Orleans, bringing the airplane to a safe stop.[3]" http://en.wikipedia.org/wiki/TACA_Flight_110

And note, after replacing the engines, two test pilots flew the plane off the levee. While not recommended or safe, a 737 can land and take off from a rough field.