Gonzaga was down 71-69 with 11 seconds to play at the Honda Center when Perkins reached across the baseline and swatted the ball from Red Raiders guard Matt Mooney, who was attempting an inbounds pass.
Perkins was in violation of NCAA Rule 7, Section 6, Article 9b, which states, "No opponent of the thrower-in shall have any part of his person over the inside plane of the boundary line."
Davide Moretti made both free throws after Perkins was given a technical foul.
"He was ball-faking a lot," Perkins said about Mooney's throw-in. "I thought he ball-faked right in front of me and, I guess, instinctually, I just reached at it. Bonehead play. [It's] something I'll think about forever. Unfortunately, that happened."
Mark Few, however, focused on the positive with the senior and his contributions to the program over his successful career.
"I mean, we can write a book on Perk and Perk and I, but listen: The amount of growth that has occurred during his five years in our program and every facet of his life is kinda what coaching is all about and what playing college basketball is all about," the Gonzaga coach said after the game.
"He's a much more mature player, a much better player now, and we've been an incredible program and had an incredible run with him at the helm."