Ashton Harvey scored 25 points to lead the Monarchs to a home win over their Longview rival.
Mark Morris (5-6, 1-3) earned its first 2A Greater St. Helens League win of the season thanks to 12-0 run early in the fourth quarter that built a 50-37 lead.
Cavin Holden scored 26 points for R.A. Long (5-7, 1-4).
MARK MORRIS 64, R.A. LONG 57
R.A. LONG — Kevin Barnett 5, Ryan Plampin 0, Aaron Ofstun 11, Cameron Holden 10, Jake Anderson 0, Jamond Harris 0, Cavin Holden 26, Jadon Williamson 5, Riki Vasquez 0. Totals 18 (10) 11-19 57.
MARK MORRIS — Deacon Dietz 11, Tanner Liasjo 0, Kobe Parlin 3, Keoni Makaiwi 0, Garrett Ness 4, Cole Busch 2, Rome Hendrickson 9, Jack Shipley 6, Jamison Watson 4, Ashton Harvey 25. Totals 23 (5) 13-24 64.