The 3 p.m. contest at Large and Dyre Streets is a rematch of last year's Public League final, won by Washington, 20-13.
In four appearances this season, DiGiorgio has thrown for 763 yards and five touchdowns.
"We obviously throw the ball quite a bit better with him in there," Doggett said.
Although it struggled last week in a 20-16 triumph at Central, Washington comes in 5-0 overall and 2-0 in the division. Frankford is 3-2 and 2-0.
The Eagles' catalysts on offense are running backs Donald Smith and Marquis Edwards. Fellow ballcarrier Ken Everage remains out with a high ankle sprain.
DiGiorgio's main targets are Denzel Turbeville, Renz Compton, and Wydell Compton. Halfback Damion Samuels is averaging more than 4 yards per carry.
Washington's defense, yielding 10.8 points per game, has flourished up front, with Justin Moody, Zaire Hollerway, Dawayne Young, and Tyrone McNeil leading the charge.
Frankford's top playmakers on defense are Renz Compton, a strong safety, and linemen Turbeville, Kadar Jones, and Sharif Miller.
With DiGiorgio's return providing a big boost, the Pioneers upend the Eagles. Pick: Frankford, 23-21.
Last week: 9-2. Overall: 42-11 (.792).
Other Friday games No. 8 Central Bucks South (5-0, 2-0 Sub. One Continental) at No. 6 North Penn (3-2, 2-0), 7:30.
Can North Penn slow wunderkind Josh Adams, who is averaging 235 rushing yards?
Pick: North Penn, 26-14.
No. 5 Ridley (5-0, 4-0 Central) at Garnet Valley (4-1, 3-1), 7. The Jaguars, surprised last week by Springfield (Delco), look to bounce back against Ridley. Pick: Ridley, 21-16.
Souderton (3-2, 1-1 Sub. One Continental) at Pennridge (4-1, 1-1), 7. The Indians' Anthony Williams and Pennridge's Mike Class showcase their running talents at Poppy Yoder Field.
Pick: Pennridge, 21-14.
West Chester Henderson (5-0, 2-0 Ches-Mont National) at Downingtown West (4-1, 1-0), 7. Henderson's veer-option offense is sparked by Garrett Girafalco and Spencer Rymiszewski.
Pick: Henderson, 24-19.
Plymouth Whitemarsh (4-1, 2-0 Sub. One American) at Wissahickon (4-1, 2-0), 7. First place in the Suburban One American is on the line.
Pick: Plymouth Whitemarsh, 19-14.
West Chester Rustin (4-1, 1-1 Ches-Mont American) at Great Valley (4-1, 2-0), 7. Rustin's Adam Burke has rushed for 391 yards and 15 TDs.
Pick: Rustin, 13-7.
Saturday Roman Catholic (2-2, 0-1 Catholic AAAA) vs. Archbishop Ryan (3-2, 0-1), at Washington, 2:30.
The Cahillites will try to put last week's 30-point defeat against St. Joseph's Prep behind them.
Pick: Roman, 27-14.
No. 1 La Salle (5-0, 1-0 Catholic AAAA) vs. Father Judge (2-2, 0-0), at Lincoln, 2:45. Judge's defense will have its hands full vs. QB Chris Kane and company. Pick: La Salle, 31-7.
Abington (4-1, 2-0 Sub. One National) at Pennsbury (3-2, 2-0), 7. Pennsbury fullback Daquan Mack is questionable after suffering an ankle injury late Monday vs. Council Rock South.
Pick: Pennsbury, 28-14.
Contact Rick O'Brien
at email@example.com, or on Twitter @ozoneinq. Read his blog, "The O'Zone," at www.philly.com/ozone