PHILADELPHIA--Ron Haigler and Mark Lonetto led Penn from an early deficit as the Quakers rode a 21-0 streak to bury Yale 98-73 last night and clinch at least a tie for its sixth straight Ivy League title.

Tenth-ranked Penn is now 22-4 overall and 12-1 in the league. The Quakers close the regular season tonight at the Palestra against Brown, which lost to Princeton, 61-57. The Tigers, 11-2 in the league, play Yale Saturday.

Yale, which made eight of its first nine shots to lead by as many as 12 points at 20-8 in the first half, led for the last time at 36-35. Haigler then ended the first half scoring with successive baskets.

The Quakers, paced by Lonetto's five-for-five shooting, then scored the first 17 points of the second half as the Elis. 319, went scoreless for almost five minutes.

Haigler had 20 points and 12 rebounds. Lonetto had 15 points and Henry Johnson had 16 points and 15 rebounds.

Gary Franks had 20 points for Yale.