TULSA, Okla. , March 18 UPI) -- Derrick Williams blocked a shot inside the very last minute Friday, salvaging a 77-75 NCAA event acquire for 5th-seeded Arizona more than No. 12 , down by way of 2 with 5 seconds in the direction of shift, was pressured towards pass up a supreme free of charge toss and the ploy labored within just that the Tigers' Wesley Witherspoon finished up with the ball....