What Happens When Nobody Is Better Off? Pareto Deterioration

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A tenured senior professor at another university, one of his department’s top researchers and best teachers, asked his department chairman for a temporary one-course teaching reduction for this Fall. The chairman refused but offered a terminal three-year appointment that included this reduction for all three years, at the same salary as if this professor taught a full load each year.
The professor accepted the deal, as he desperately wanted the teaching reduction this Fall, figuring he could get a teaching job elsewhere after three years. But he tells me he would have been happier teaching a full load over the next two years, and would rather not have to search for a job in two years. He is worse off. The department and university are also worse off, since they lose his courses in each of the next two years, and thereafter will not get the benefit of his teaching and his research/publication luster; and students are worse off too.
Is this really a Pareto deterioration—a new economic phrase denoting a change in which at least one person is worse off, and nobody better off? And is the phrase Pareto deterioration the best name for this unusual phenomenon?