O’Connell jumped out to one of the best starts in the Washington Catholic Athletic Conference, with the only blemishes on its résumé being early-season losses to Paul VI and McNamara.

But then the Knights fell to Bishop Ireton on Jan. 9, a loss that could have started a slump. Instead, O’Connell has rattled off three consecutive wins since then, shocking St. John’s on Jan. 11 and topping Paul VI on Friday.

Elsewhere last week, Madison beat Chantilly in a game between two of Northern Virginia’s top teams. Great Mills continued its undefeated start with a win over North Point, the Southern Maryland Athletic Conference’s most accomplished program. Also, Riverdale Baptist beat National Christian in a battle of independent schools.

This week, St. John’s will test top-ranked McNamara in what was one of the area’s best rivalries last season. Two-time All-Met Player of the Year Azzi Fudd is back for the Cadets, but the Mustangs haven’t lost to a local team this season.

1. McNamara (17-3) Last ranked: 1

Four Mustangs scored in double figures during their 96-25 rout of Holy Cross.

2. Riverdale Baptist (15-3) LR: 3

Using their up-tempo system, the Crusaders beat National Christian, 76-59.

3. Madison (16-0) LR: 4

Guard Tedi Makrigiorgos scored 23 points in the Warhawks’ 73-24 win over Westfield.

4. O’Connell (14-3) LR: 6

Forward Ajia James scored 16 points in the Knights’ 45-39 win over Paul VI.

5. Paul VI (17-3) LR: 2

Lee Volker’s 13 points weren’t enough in the Panthers’ 45-39 loss to O’Connell.

6. Sidwell Friends (11-3) LR: 7

The Quakers won both of their games at the Rose Classic Super Jam in New York.

7. Pallotti (14-5) LR: 5

After a loss to Roland Park Country, the Panthers beat John Carroll.

8. New Hope (16-7) LR: 9

The Tigers traveled to California and beat Benson Tech (Ore.) and Cathedral Catholic (Calif.).

9. C.H. Flowers (10-1) LR: 10

The Jaguars won three games last week by an average of 44.3 points.

10. Stone Ridge (13-2) LR: 11

Princeton commit Chetanna Nweke scored 23 points in the Gators’ 52-45 win over Maret.

11. National Christian (14-6) LR: 8

The Eagles fell to Riverdale Baptist but beat Summit Academy (N.Y.) and Kenwood (Ill.).

12. St. John’s (11-4) LR: 12

The Cadets won each of their games by 20 points last week.

13. Elizabeth Seton (14-4) LR: 13

Since losing back-to-back games, the Roadrunners have won four in a row.

14. Howard (14-0) LR: 14

Guard Anii Harris scored 18 points in the Lions’ 63-29 win over Centennial.

15. Churchill (11-1) LR: 15

Forward Parker Hill had 19 points and 14 rebounds in the Bulldogs’ win over rival Whitman.

16. Great Mills (13-0) LR: 16

The Hornets took down North Point, the SMAC’s most accomplished program.

17. Dunbar (16-2) LR: 17

Guard Zy’aire Hairston had 14 points and eight assists in the Crimson Tide’s 66-10 win over McKinley Tech.

18. W.T. Woodson (13-2) LR: Not ranked

The Cavaliers had a strong week, capped by a 47-26 win over West Springfield.

19. Edison (10-4) LR: NR

Guard Aurea Gingras scored 15 points in the Eagles’ 47-40 win over Marshall.

20. Old Mill (11-1) LR: NR

After a loss to Spalding, the Patriots coasted to a pair of Anne Arundel County wins.

Dropped out: No. 18 Clarksburg (11-1), No. 19 Chantilly (9-4), No. 20 West Springfield (12-3)

On the bubble: West Springfield (12-3), Loudoun Valley (9-0), Georgetown Visitation (8-7), Maret (9-5)