PULLMAN, Wash. — Gonzaga center Josh Heytvelt had scored five points in the first half, was in foul trouble and was being taunted with chants of "mushrooms!" by Washington State fans who were alluding to a past drug offense.

Then he erupted for 17 points in the second half to key a Gonzaga blitz that blew open a close game and the fourth-ranked Zags went on to beat Washington State 74-52 on Wednesday night to remain undefeated.

"I was feeling it," said Heytvelt, who grew up in nearby Clarkston and had a large group of family and friends at the game. "It was really fun."

For more than 20 minutes, Washington State (6-3) imposed its slowdown style of play and trailed 32-31 in the opening seconds of the second half.

Then Gonzaga (7-0) launched a 27-2 run over a 10-minute span and Heytvelt, who leads the team in scoring and rebounding, had 11 points in the spurt.