Sherwyn Devonish (1) and Wise earned an impressive win over Bladensburg on Friday. (Photo by Doug Kapustin/For The Washington Post)

A new No. 1 team in the region has emerged. With wins against locally ranked teams in Eleanor Roosevelt and St. John’s and nationally competitive programs in Oak Ridge (Fla.) and Archbishop Wood (Pa.), DeMatha has shown the depth and durability to claim the top spot.

That hasn’t been the only shake-up in the first few weeks of the season. Four teams — Bishop O’Connell, Osbourn, Friendship Tech, and South County — enter the rankings with strong resumes in their opening games.

Plus, Riverdale Baptist, anchored by seniors Donovann Toatley and David McCullough, each averaging more than 18 points a game, made the biggest jump of the previously ranked teams, moving up nine spots.

Here are this week’s rankings.

1. DeMatha (5-0) Last week: 2

After a dominant showing at National Hoops Fest two weekends ago, the Stags earned two Washington Catholic Athletic Conference wins, including a 69-51 win at St. John’s on Friday.

2. Paul VI (3-1) LW: 1

How to respond to a buzzer-beater loss against Oak Ridge (Fla.) on Dec. 10? Beat The Heights, 116-30, six days later.

3. Gonzaga (6-0) LW: 5

Forward Myles Dread, the tournament MVP in the Eagles’ Gonzaga DC Classic championship from Dec. 8-10, had 17 points in a 90-40 win over St. Mary’s Ryken on Tuesday.

4. Loudoun Valley (4-0) LW: 4

Guard Dominic Peterson hit a buzzer-beating three-pointer to give the Vikings a 72-70 win over Battlefield on Saturday.

5. Georgetown Prep (4-1) LW: 7

After the 79-77 victory over Westtown (Pa.) on Dec. 9 in which guard Jared Bynum had 29 points and seven assists, the Little Hoyas beat Avalon, 83-54, last Monday.

6. Riverdale Baptist (8-3) LW: 15

Wins over Wilson, Wise and Eleanor Roosevelt — when guard Donovann Toatley hit the game-winning shot in the 69-67 victory on Saturday — have highlighted the Crusaders’ start.

7. Wilson (8-3) LW: 3  

Guard Jay Heath had 23 points and the game-winning buzzer-beater to lead four players in double figures in the Tigers’ 80-78 win over Episcopal on Saturday, but fell, 77-72, to Pallotti on Sunday.

8. Wise (3-1) LW: 8

Against his former team, guard Sherwyn Devonish led the Pumas to a 68-52 win over Bladensburg on Friday, erasing the sting from losing to Riverdale Baptist last Tuesday.

9. St. John’s (4-3) LW: 6

The Cadets responded to a 72-65 loss to IMG Academy on Dec. 10 with a 41-points win over Good Counsel last Tuesday, but couldn’t keep pace with DeMatha’s depth on Friday.

10. Bullis (7-2) LW: 13

After splitting their first two games of the Bullis Holiday Classic, the Bulldogs came within one point, 67-66, of Westtown (Pa.) on Sunday to finish fourth in their home tournament.

11. Springbrook (4-0) LW: 18

After beating Blake, 96-93, on Tuesday with five players scoring at least 10 points, the Blue Devils beat Whitman, 67-59, on Friday night.

12. Eleanor Roosevelt (1-2) LW. 9

Jaden Faulkner and Cameron Brown had 20 points apiece in the Raiders’ 87-79 win over DuVal on Friday, but the team fell to Riverdale Baptist by 2 on Saturday.

13. Sidwell Friends (4-2) LW: 11

A 46-43 home loss to St. Alban’s on Thursday night ended the Quakers’ four-game winning streak.

14. Fairmont Heights (3-0) LW: 20

The defending Maryland 1A state champions have opened the season with three wins and 12.6-point average margin of victory.

15. Rock Creek Christian (3-2) LW: 12

The Eagles picked up two wins this week, beating Battlefield, 63-50 on Wednesday and Bladensburg, 57-53, on Saturday.

16. Bishop O’Connell (4-1) LW: NR

After beating Georgetown Prep and losing to Paul VI to start the season, the Knights enter the rankings having won three straight.

17. Potomac (Md.) (2-0) LW: 16

The Wolverines have started their season with wins over Oxon Hill and Westlake, scoring more than 80 points in each.

18. Osbourn (6-1) LW: NR

Wins over defending Virginia 6A state champion W.T. Woodson and perennial power Potomac (Va.) highlighted the Eagles’ 6-0 start before they fell to Stonewall Jackson, 81-63, on Friday.

19. Friendship Tech (5-0) LW: NR

A 55-53 win over Riverdale Baptist on Dec. 2 was the second of the Titans’ five straight wins to start the season.

20. South County (7-0) LW: NR

Senior Quentin Millora-Brown, a 6-foot-10 center, is averaging 13.3 points and 11 rebounds per game.

Dropped out: No. 10 Potomac (Va.) (4-2), No. 14 Bladensburg (0-3), No. 17 Stone Bridge (1-2), No. 19 W.T. Woodson (4-3)

Bubble: South Lakes (6-1), Gaithersburg (4-0), St. Andrew’s (6-1), Pallotti (8-3)