HARVARDEDGE  HOLY CROSS QUARTERBACK: Brian White, now the fourth most prolific passer in Harvard history, showed great poise in Harvard's 25-17 come-from-behind victory last weekend at Brown. Though he's seemed somewhat flustered this year, the two-year starter did lead Harvard to two fourth quarter scores that sealed the game. And though he did complete passes to eight different receivers, his completion percentage is still a measly .442. Has thrown only four touchdowns, half as many as he had at this time a year ago, but has thrown just three interceptions.  *  QUARTERBACK: This was a problem area earlier this year, but Coach Rick Carter has decided to go with freshman Jeff Wiley (40-86-517-3TD-5INT). The move has paid off so far. But Dave Hock (34-83-399-ITD-6INT) could see action. Wiley is much smaller than Hock but is much quicker. Neither has much experience, which could be a problem against Harvard's tough defense. RUNNING BACKS: The squad's best area a year ago, it has struggled this year. Has showed signs of life in spots, particularly in second half a week ago. The leader--and the best runner in the Ivy League--is senior fullback Robert Santiago, who scored two rushing touchdowns last week. That marked the first time since the season opener last year he had turned that trick. The All-Ivy runner has picked up 472 yards this year, and needs just under 300 more to become the fifth leading rusher in Harvard history. The loss of junior halfback Rufus Jones to a knee injury has hurt this group, but juniors George Sorbara and Joe Pusateri have filled more than adequately. Lots of speed in this group.  *  RUNNING BACKS: Harvard sees today the best opposing runner it will go against this year. Senior Gill Fennerty (202-1082-4TD) went over the 1000-yd. mark last weekend for the third straight season. A slashing runner much in the mold of Santiago, Fennerty leads a very balanced Crusader running game. He is aided by fullback Chuck Doyle (95-371-3TD) The Crusaders run almost twice as often as they pass. Doyle is backed up by the very able Mike Dooley and Fennerty by the ever-improving Rick Lane. Talented group with lost of speed. RECEIVERS: Sophomore LaMont Greer won the starting split end job a month ago, but missed last week's game for personal reasons. He'll be back this week, and that should add some excitement to this area. Like the running backs, Harvard's receivers have blazing speed. And there's plenty of people here, too. Eight Cantabs caught a pass last week. The biggest threat, though, is Santiago, who's caught twice as many passes as anyone.  Even  RECEIVERS: The top targets here are flanker Leo Carlin, who has caught 21 passes for 312 yards, Fennerty, who has grabbed 18 catches for 144 yards and one touchdown, and speedy split end Lee Hull, who checks in with 11 catches for 246 yards and two touchdowns. Senior Greg Laugeni is the tight end. Don't forget, though, the Cross won't put the ball in the air very much. OFFENSIVE LINE: The squad's weakest area, this group hasn't given the Crimson runners the holes they enjoyed a year ago. Nor has it provided adequate protection for White. Perhaps its only bright spot of the season came in the second half against Brown. But that was probably more a result of Bruin problems. The leader of this unit, which will have its hands full with the Holy Cross defensive line, is senior left tackle George Kostakos.  *  OFFENSIVE LINE: An inexperienced offensive line is one of the main reasons Holy Cross (3-4-1) has struggled so far this year. This unit is led by senior right tackle Brendan Sullivan and junior left tackle Kevin Reilly. Biggest trouble spot has been at left guard, where sophomore Ron George has played erratically. Hasn't really provided Fennerty and Doyle with the holes they've seen in the past. Very similar to Harvard's weak offensive line. DEFENSIVE LINE: One of Harvard's most improved units, the defensive line that includes Bill Ross, K.C. Smith and Jerry Garvey has been very stingy the last three weeks. The Crimson has allowed an average of just just 12 points a game over the past three weekends. A week ago, it put Bruin quarterback Steve Kettelberger under tremendous pressure and caused four Brown fumbles.  Even  DEFENSIVE LINE: The Cross has been tougher against the run than the pass, and that's a result of the play of this unit. Left tackle Ed Kutschke (with 96 tackles) has been especially rough on passers with eight sacks. This unit--which includes four seniors and just one junior--is very big and very experienced. As solid as Harvard's seen this year. LINEBACKERS: Senior linebacker Brent Wilkinson leads Harvard in tackles with 71 and last week the Crimson captain picked off a Brown pass in the closing moments to secure Harvard's victory. This is one of the Crimson's top areas, with Scott Collins and Bob Joyce providing more than adequate support for Wilkinson.  *  LINEBACKERS: Right linebacker Jerry McCabe has 136 tackles to lead the team. The junior is paired with fellow junior Scott Rudy. Both are much better against the run than the pass and provide more than adequate support for the front five. Both are 6-ft., 1-in. Neither is incredibly quick. DEFENSIVE SECONDARY: This is the area many consider Harvard's best. Led by senior safety Cecil Cox, who has picked off four passes, the Harvard defensive secondary will have to continue to play well for the Crimson to succeed. So far this season, this extremely aggressive unit hasn't been burned.  *  DEFENSIVE SECONDARY: The weakest link on the team, the defensive secondary has been shaky in spots this year. There are no experienced starters among this group, which includes two juniors and two sophomores. Free safety John Vesprani is the leader, with 69 tackles and one interception. The Holy Cross secondary has four interceptions as a unit.