Penn State is 48-12 overall (80.0) since the beginning of the 2005 season, the nation's ninth-best winning percentage.
Penn State improved to 7-1 in road games the last two seasons (6-1 Big Ten).
Joe Paterno posted his FBS all-time leading 391st victory. The coach in his 44th season at Penn State and has a 391-128-3 (75.2) mark.
During the Nittany Lions' five-game winning streak, they have forced 11 turnovers and committed only two. Penn State has not had a turnover the past three games.
Penn State held Northwestern to a season low for points, less than half its season scoring average of 27.2 ppg, forced two turnovers and recorded a season-high six sacks.
Northwestern's 13 first half points were the most given up by Penn State in a first half this season, topping the 10 Michigan scored on Oct. 24. The Wildcats scored just the second first half touchdown against the Lions this season.
Penn State trailed (13-10) at the half for the first time this season.
The Nittany Lions have held seven of their first nine opponents to 13 points or less for the first time since 1989.
Penn State leads the nation in scoring defense at 9.33 ppg. Florida is second at 11.0 ppg, followed by TCU (11.13), Nebraska (11.25) and Alabama (11.38).
Penn State leads the Big Ten in all the major Big Ten defensive statistical categories: scoring (9.33 ppg), rushing yards per game (84.1 avg.), passing yards per game (170.6 avg) and total defense (254.8 ypg), tackles for losses (79, 8.78 avg.) and sacks (32, 3.56 avg.).
The Nittany Lion defense is ranked in the Top 12 nationally in all the major statistical categories: scoring (1st), rushing (5th), pass efficiency (6th), passing (12th) and total defense (5th), as well as TFL (2nd) and sacks (4th).
Daryll Clark leads the Big Ten in pass efficiency (149.3, 14th in nation), is second in passing yardage (239.8 ypg) and third in total offense (256.2).
Daryll Clark also leads the Big Ten with 18 touchdown passes, good for a tie for No. 6 in the nation.
During Penn State's five-game winning streak, Daryll Clark has thrown 9 TD passes, has 5 rushing TD and just one interception.
QB Daryll Clark passed Michael Robinson (5,168) and Kerry Collins (5,300) to move into third all-time in career total offense at Penn State with 5,453 yards. Tony Sacca (6,000) and Zack Mills (7,796) are ahead of Clark.
Clark posted his 12th career game with 200+ passing yards to stand alone in third place all-time at Penn State. Only Kerry Collins (16) and Zack Mills (16) had more. The Nittany Lions are 11-1 when Clark throws for 200 yards.
Clark's 53-yard TD pass to Derek Moye moved him into a tie with Chuck Fusina (1975-78) for fifth all-time at Penn State with 37. Kerry Collins is fourth with 39 career TD passes.
Clark has 378 career completions, moving into a tie for fourth place at Penn State with Wally Richardson.
Daryll Clark's two-yard rushing TD in the second quarter was the 20th rushing TD of his career, tying him with Michael Robinson (2002-05) for the most all-time by a Penn State quarterback.
Daryll Clark has 4,797 career passing yards, good for seventh place in school history. Todd Blackledge is sixth with 4,812.
Clark's 274 passing yards vs. NU were the fourth-highest total in his career.
TB Evan Royster passed Eric McCoo (2,518) for 11th all-time on the Penn State rushing chart with 2,608 yards.
TB Evan Royster posted a career-long 69-yard TD run in the fourth quarter. It marked the longest run from scrimmage for Penn State this season. The run also put Royster over 100 yards rushing for the fifth time on the season and 11th time on his career, tying him with D.J. Dozier for ninth all-time in 100-yard rushing games at PSU.
The Nittany Lions are 11-0 when Royster rushes for 100 yards.
Derek Moye tied his career-high with six receptions for the third straight game and fourth time this season. He also posted his third 100-yard receiving game on the year.
Derek Moye's 53-yard TD catch was the long reception of his career.
DT Jared Odrick's block of a Northwestern field goal late in the first half was the first by a Penn State player since Odrick blocked a 29-yard attempt vs. Florida International in the first game of the 2007 season. Odrick had a season-high five solo tackles, including a 10-yard sack on NU's first play of the third quarter.
LB Sean Lee made his first start since the Temple game on Sept. 19. Lee led Penn State with 12 tackles (10 solo) and moved into fifth all-time in career tackles at Penn State with 288, passing Dennis Onkotz (287).
CB D'Anton Lynn had a career-high six tackles, including a tackle for loss.
DE Jack Crawford made his second fumble recovery of the season on Northwestern's opening possession.
WR Justin Brown equaled a career-long with a 26-yard catch in the third quarter for Penn State's first 20-yard play of the game.
RB Brandon Beachum scored his first touchdown of the season and the second of his career to give Penn State a 20-13 lead in the 4th quarter.
Penn State was 4 of 4 in the Red Zone, improving to 26 of 26 (19 TD, 7 FG) over the past seven games. For the season, the Lions are 32 of 37 (86 pct.) in the Red Zone.
The Nittany Lions' 93-yard touchdown drive in the second quarter (in seven plays) was their longest drive of the season in yards.
Penn State leads the series with Northwestern, 10-3, winning the last three meetings.
The Nittany Lions (8-1, 4-1) host Ohio State (7-2, 4-1) Saturday at 3:30 p.m. in Beaver Stadium's 300th game. The game will air on ABC (ESPN2 outside the ABC coverage area), the Penn State Sports Network and GoPSUsports.com. Penn State won, 13-6, last year in Columbus to even the series, 12-12.