Purdy squandered an eight-point lead in the third quarter and watched as the Tigers roared back in the fourth quarter to tie the game at 51-51 with 2:25 remaining in the fourth period.
Needing someone to step up and make a play, the Eagles' Cameron Terry answered the call. With the game in the balance, Terry blocked a shot by Hollister's Nick Lytle.
Purdy then pushed the ball down the court where Drew Williams forced up a shot that caromed off the rim. Terry, who was trailing the play, outjumped every player on the court to tip in the miss and give the Eagles the lead for good.
"There is no doubt that those two plays were huge in securing this win tonight," said Purdy coach Tommy Egan. "The boys gave maximum effort and stepped up and made plays when it mattered most."
Purdy clung to a 14-13 lead after one quarter of play, and took a 29-25 lead into halftime. In the second half, the Eagles used a one-three-one full court press to force eight Tigers' turnovers. Hollister, however, was deadly accurate from beyond the 3-point arc, sinking four triples in the third period and three more in the fourth quarter to keep the game close.
"It seemed like every time we would make a run and take a six-point lead, Hollister would hit a three and get right back in the game," said Egan. "The key for us is to get ready for our next game and keep playing well."
Scoring for Purdy were: Williams, 21 points; Devon Bennett, 15 points; Terry, 7 points; Alex Haworth, 4 points; and Cody Hall and Glenn Scott, 2 points each.
Purdy will play the winner of the Wheaton-Cassville game on Wednesday night at 9 p.m. in Southwest.