The University of Oregon's plan to build a new basketball arena moved a giant step forward Monday when Nike co-founder Phil Knight, and his wife, Penny, pledged $100 million to the university, the largest philanthropic gift in school history.

The money is not targeted specifically for an arena, university officials said. Rather, it will create the Oregon Athletics Legacy Fund, which will help support all athletic programs.

But indirectly, officials said, the donation will boost the university's effort to replace aging McArthur Court with a new arena near the eastern edge of campus.

"This extraordinary gift will set Oregon athletics on a course toward certain self sufficiency and create the flexibility and financial capacity for the university to move forward with the new athletic arena," Athletic Director Pat Kilkenny said. "Now we can roll up our sleeves and get to work on making the arena a reality."