Video: Top 25 high school volleyball rankings
Myckena Guerrero takes a look at the national rankings this week.
Four Top 10 teams lost week, including three who were previously unbeaten, and one of the newly ranked teams went from unranked to a Top 10 spot in this week's MaxPreps Xcellent 25 National High School Volleyball Rankings presented by the Army National Guard.
Mercy (Farmington Hills, Mich.) owns a 28-game win streak and swept through the Beast of the East Tournament without losing a set to run its record to 39-2.
In dominating the "Beast," Mercy defeated 44-4 Lake Orion (MI) in the finals and 35-5 Grand Rapids Christian (MI) in the semifinals. With All-American Jess Mruzik in the lineup, the Marlins have lost just one set this season.
Redondo Union (Redondo Beach, Calif.) remained No. 2 behind top-rated Assumption (Louisville, KY), winners of 52 in a row. The Yorktown Tigers, ranked No. 3, obliterated three opponents as the postseason began, outscoring their foes 225-62 in winning all nine sets.
Losing over the weekend were the Nos. 6, 7, 8 and 10 teams and only Marist (Chicago) and Helias (Jefferson City, Mo.) remained in the Top 25.
In addition to Mercy, three other teams join the Top 25 this week — Oviedo (Fla.), and unbeatens D.H. Conley (N.C.) and Old Tappan (N.J.).
MaxPreps Xcellent 25 National High School Volleyball Rankings presented by the Army National Guard

Grace Millard, Helias
Photo by Marty Beck
1. (Last week 1) Assumption (Louisville, Ky.), 36-0The Rockets opened the playoffs with a 3-0 (25-15, 25-13, 25-14) win over Male (Louisville) and ran their win streak to 52.
2. (2) Redondo Union (Redondo Beach, Calif.), 32-2The Seahawks ended their regular season with 15 wins in a row.
3. (3) Yorktown (Ind.), 31-0The Tigers ran their win streak to 31 with a trio of playoff-opening wins.
4. (4) Mater Dei (Santa Ana, Calif.), 35-2The Monarchs captured the Trinity League title and concluded the regular season with six-straight wins.
5. (5) Byron Nelson (Trophy Club, Texas), 37-1The Bobcats beat Carroll (Southlake), 3-1. They have won 13 straight matches.
6. (9) Millennium (Goodyear, Ariz.), 38-1In 96 sets this season, the Tigers have lost six and none in their last nine matches.
7. (12) Cedar Falls (Iowa), 42-0The Tigers captured the Missouri Valley Conference tournament for the second year in a row and have lost just one set this season.
8. (NR) Mercy (Farmington Hills, Mich.), 39-2The Marlins went 7-0 without losing a set in winning the prestigious Beast of the East Invitational. They last lost more than a month ago, have won 28 straight and have not lost with National Youth Girls Team player
Jess Mruzik on the court.
9. (11) Walton (Marietta, Ga.), 36-3The Raiders latest win streak is at 11. They opened the postseason with 3-0 wins over 20-20 Roswell and 33-16 Etowah (Woodstock).
10. (16) Castle (Newburgh, Ind.), 34-1The Knights have won 25 in a row after opening the postseason with 3-0 wins over 15-11 Reitz (Evansville) and 27-8 Jasper. Up next: South (Bloomington), 22-1.
11. (14) Torrey Pines (San Diego), 27-3The Falcons have won 15 of their last 16 and close out their regular season this week.
12. (15) Kamehameha Kapalama (Honolulu), 33-2The Warriors beat previously ranked and Honolulu rival Iolani (22-5) for the fourth time this season.
13. (17) Chaparral (Parker, Colo.), 15-1The Wolverines ran their win streak to 10 and have lost just four sets during the streak.
14. (18) Ridge Point (Missouri City, Texas), 38-4The Panthers ran their win streak to 24 with a pair of wins over Fort Bend rivals. They have lost just seven sets during the stretch.
15. (21) The Woodlands (Texas), 40-4The Highlanders have won 14 in a row with only two losses in set play during that span. Senior Georgia Murphy (Miami pledge) is averaging 6.3 digs per set.
16. (19) Mt. Carmel (New Orleans), 28-1The Cubs have won 14 in a row and have lost only one set during that streak. Up next is 26-5 Archbishop Chapelle (Metairie).
17. (22) Champlin Park (Champlin, Minn.), 22-1The Rebels have won 11 in a row and have not lost a set during that streak. Up next: 21-4 Osseo (MN).
18. (23) Northwest (Germantown, Md.), 11-0The Jaguars got 21 kills from
Jenaisya Moore in blanking Churchill (Potomac, Md.) to run their win streak to 39 matches.
19. (24) Briarcrest Christian (Eads, Tenn.), 37-2 The Saints opened the postseason with a lopsided 3-0 win over Lipscomb Academy (Nashville).
20. (6) Marist (Chicago), 28-2The Redhawks close out the regular season with a pair of tough outings this week — 28-5 Benet (Lisle) on Tuesday and 22-3 Nazareth Academy (LaGrane Park) on Thursday.
21. (7) Helias (Jefferson City, Mo.), 33-1-2The Crusaders saw their perfect season end in a 2-0 (25-23, 26-24) loss to 25-4 Herman. They rebounded by winning the Ozark Grand Slam Tournament last weekend.
22. (NR) NV - Old Tappan (N.J.), 18-0The defending state D3 champions have won 23 in a row and haven't lost since October to Immaculate Heart Academy (Washington Township, N.J.). The Golden Knights get their chance for revenge on Thursday when they travel to 27-1 Immaculate Heart, winners of 17 in a row.
23. (NR) D.H. Conley (Greenville, N.C.), 18-0The Vikings have three games this week against opponents with a combined record of 18-29. The regular season ends Wednesday against 3-12 Eastern Wayne (Goldsboro, N.C.).
24. (25) Fossil Ridge (Fort Collins, Colo.), 15-1The Sabercats are winners of 15 straight, the last six without losing a set.
25. (NR) Oviedo (Fla.), 21-4The Lions won the Swing for Cure tournament defeating previously ranked Plant in the finals. They are peaking at the right time as the playoffs begin this weekend.
Dropped out: Blue Valley North (Overland Park, Kan.), Mattawan (Mich.),
Sterling (Ill.), Plant (Fla.).