Quarterback: Despite having consecutive tough weeks calling the signals for Harvard, junior QB Tom Yohe is still the key to Coach Joe Restic's offense. For the year, Yohe has completed close to 50 percent of his passes for 1820 yards and 15 TD's (one shy of the Harvard single-season record). Yohe's performance over the next two weeks will determine Harvard's Ivy title chances.

Running Backs: Harvard certainly missed Bob Glatz (52 attempts, 238 yards, 4.6 average) and Tony Hinz (97,530,5.5) last week against Holy Cross, as the running game failed to net positive yardage. With Hinz expected to return against the Quakers, the Crimson rushing attack (1125 yards overall) should definitely improve at home.

Receivers: With his 11-catch performance last week against the Crusaders, Brian Barringer moved into fourth place on Harvard's all-time single-season list with 42 receptions, 14 shy of the mark set by Pat McInally in 1973. Along with Barringer, TE Kent Lucas (18.2-yd. reception average) and Neil Phillips (14.5) lead this talented corps of receivers.

Offensive Line: Forget about the Crimson's poor running performance against the more talented Crusaders. The Harvard offensive line is one of the bigger and better units in the Ivies, and should have no major problems against Penn.

Defensive Line: Harvard's front five can control the action of any game from the line of scrimmage. Even against a Crusader rushing attack that averages close to 200 yards per game, Captain Kevin Dulsky and Co. gave up only 128 yards on the ground. With its four sacks of Holy Cross QB Jeff Wiley, Harvard now has 33 for the season. The single-season record is 34.

Linebackers: The duo of Richard Mau (39 tackles) and Kris Thabit (38) continues to lead all Harvard defenders. This aggressive tandem has been a big reason why Harvard has alllowed fewer than 700 yards rushing in eight games.

Secondary: Despite giving up 1690 yards in the air, the Crimson secondary has improved since the beginning of the season. Sophomore safety Jim Smith, who replaced the injured Bryan Gescuk last week, picked off two Jeff Wiley passes at Holy Cross.

Kicking Game: Bruce Jacob has not missed an extra point (25-for-25) but has converted only five of 11 field goals. Punter Alan Hall, who has averaged close to eight punts per game, has posted a 33.3-yd. average. PENN

Quarterback: Penn QB John Keller has not thrown the ball very much this year. But of his 80 attempts, Keller has completed 50 of them for 554 yards and two TD's. Coach Ed Zubrow has been conservative in his pass offense throughout the season, as Keller has averaged only 11 yards per completion. Back-up Malcolm Glover might take over the offense if Keller proves ineffective against the Crimson.

Running Backs: The duo of Chris Flynn and Brian Keys has combined for 190 attempts, 997 yards and seven TD's. The Quakers have run the ball for 1765 total yards and have averaged 220 yards per game. Two other Penn rushers (Jim Bruni and Mike Waller) have close to 300 yards each. If the Quakers run the ball well, it may be a long afternoon for the Crimson.

Receivers: Penn doesn't possess a dominant receiver, but its receiving unit has been consistent throughout the season. Brent Novoselsky leads the Quakers with 15 catches, while Scott Sandler has posted a 15.8-yd. receiving average. But Penn won't go to the air unless it's positively necessary.

Offensive Line: The line can create big holes for Quaker runners, but it has had problems protecting Keller, who has lost 102 yards behind the line of scrimmage. Facing what is perhaps the best defensive line in the Ivies will not make matters any better.

Defensive Line: The Quaker front three of Dan Bauer, Mike Lista, and Ross Parsons anchor a Penn defense that has given up 1262 yards on the ground. Lista is second on the team with 56 tackles and tied for first on the squad with six sacks. Bauer has recorded 41 total tackles. Overall, Penn has sacked opposing quarterbacks 26 times in '87.

Linebackers: Penn's four-man linebacking unit is led by leading-tackler Brad Hippenstiel (76 tackles, six sacks). This group--probably Penn's greatest strength when the opposition has the ball--is the key to the entire Quaker defensive attack.

Secondary: The Quaker secondary has offered tough pass coverage all season long. Led by Steve Walter-house (40 tackles, two interecptions) and Steve Johnson (28, two), the Quakers have given up only 1057 yards passing.

Kicking Game: Placekicker Jim Grass has posted impressive numbers. He has hit 11 of 14 field goals and all 15 extra point attempts for a total of 48 points. Punter Dave Fassnacht has averaged close to 35 yards per punt.