Led by the record-breaking performance of goaltender Scott Bonnell '98, the men's hockey team overcame a midseason slump to make the ECAC playoffs.     The Mules posted a season record of 13-8-3, including a quarterfinal loss to third-seeded Hamilton in the ECACs. Colby lost only one of its final six games heading into tournament play after enduring a four-game losing streak earlier in the year. Head coach Jim Tortorella said the losses may have helped the team mature. "The adversity we survived in the middle of the season says something about the character of the team," he said. "We were excited to represent our school as the defending ECAC champions."     Bonnell, who established a school record goals against average of 2.05, teamed with fellow goalie Jason Cherella '99 and all-ECAC defenseman Rob Koh '99 to provide solid defense. Senior Terry Flynn, who was honorable mention all-ECAC, led the team in scoring.