What infraction occurs if insufficient shuffling is found to be intentional?

The infraction that occurs if insufficient shuffling is found to be intentional is classified as "Cheating - Manipulation of Game Materials." This designation reflects a serious violation because it involves a player intentionally attempting to gain an unfair advantage by improperly managing their deck. Insufficient shuffling can result in a player not randomizing their deck adequately, which can affect the outcome of the game. When this action is deemed intentional, it signifies a clear breach of the integrity of the game, as the player is deliberately manipulating the randomness of card draws to benefit themselves strategically.

In evaluating the other options, "Cheating - Deck Mismanagement" would not apply since deck mismanagement typically covers issues like failing to present a legal deck, not the intentional manipulation involved here. "Unsporting Conduct" relates more to behavior that is disrespectful or inappropriate rather than direct cheating. Lastly, "Insufficient Shuffling" is a description of the action rather than the severity of the intent behind it. Hence, recognizing the intention behind the action is what leads to "Cheating - Manipulation of Game Materials" being the correct categorization.