Pac-12 officiating crews were heavily criticized last week following a series of questionable decisions in key moments, but according Pac-12 vice president of officiating David Coleman, the two most controversial calls were handled correctly.

Oregon’s game-winning touchdown against Arizona State

The first controversial call occurred in the third overtime of Oregon’s 61-55 win against Arizona State Thursday night. Oregon quarterback Vernon Adams Jr. hit Bralon Addison for a 20-yard touchdown, which turned out to be the game-winning score. On first glance it seemed pretty clear Addison’s left foot was the first to make contact with the ground and his toe was out of bounds, however, in an interview with ESPN.com, Coleman said it was determined by the officials on the field that Addison’s right toe hit the ground first when possession took place.

When it went to the replay booth for review, Coleman said there wasn’t an angle that gave conclusive evidence to show the right toe was not in contact with the ground when Addison first gained possession, therefore the touchdown call was correctly upheld.

“It was tough to see the right foot,” Coleman said. “We couldn’t confirm that because it was a grass field.”

Grass, in this case, is notable because if the play were to have occurred on an artificial surface, rubber pellets likely would have made it possible to make a definitive conclusion.

The play can be viewed here.

Arizona State could also argue if it weren't for an earlier missed call, the game likely would not have made it to overtime. With about five minutes left in the game, the Sun Devils had the ball at the Oregon 48, leading 41-34. On a first-down play, Arizona State quarterback Mike Bercovici was intercepted by Tyree Robinson, but replay shows that Oregon's outside linebacker was offsides.

"Agree. Offside on the defense should have been called," Coleman said. "The defender did not get out of the neutral zone before the ball was snapped."

It was a tough call to make live, but when watching the replay frame-by-frame, it was conclusive. The still frame captured below was the second frame after the snap began.

Moment the ball was snapped on the interception. pic.twitter.com/xqHuNADnam — Kyle Bonagura (@BonaguraESPN) October 30, 2015

The problem here is that offsides is not a reviewable play. So once the officials missed the call on the field, there was no recourse within the rulebook to go back and change it.

Coleman said he was not in favor of making offsides a reviewable play.

Stanford RB Christian McCaffrey’s fumble against Washington State

Late in the third quarter of Stanford's 30-28 win, with Washington State leading 22-10, McCaffrey was brought down near the left sideline at the Cougars' 20 yard-line. A fumble was not called on the field, but replay clearly shows McCaffrey losing control of the ball while still in bounds.

Coleman disputed that. His interpretation of the play, which mirrored the call on the field, was that McCaffrey’s foot was out of bounds before the ball came free.

The second part of the play -- a clear recovery by the defense -- was more difficult to confirm on replay. When I watched the replay at regular speed, it looked like the WSU defender’s foot was out of bounds when he secured the ball, but I changed my opinion after watching several times in slow motion. It does appear there is a brief moment before his foot is out of bounds that he has the ball secured with one hand.

Again, Coleman disagreed, citing the lack of irrefutable visual evidence.

It should be noted that because the officials determined there wasn't evidence to overturn the ruling that McCaffrey was out of bounds, the recovery shouldn't have actually played a part of the review process.

Coleman added offensive pass interference should have been called against Washington State receiver River Cracraft on this play.