Kenzee Hudson scored twice, and Carly Newman added a goal.
Riverside earned a fifth seed in the South Jersey Group I tournament, which will begin next week.
Nonleague. Kaileen Banks scored a goal and assisted on one by Rebecca Williams as host Pitman beat Pennsville, 2-0.
Nicolette Wilkins scored twice in Bishop Eustace's 7-0 rout of Winslow Township.
Natalie Knauer scored twice, giving her 22 goals this season, as Gateway cruised into the quarterfinals of the South Jersey Group 1 field hockey tournament with a 6-0 victory over visiting Lindenwold.
Knauer, a senior, also assisted on two goals.
The seventh-seeded Gators move on to face No. 2 Glassboro, which had a first round bye, next Wednesday.
Megan Matsuk added two goals, and Gateway built a 4-0 halftime lead over the 10th-seeded Lions.
Molly Hubert made six saves for the shutout.
Pitman 2, Clayton 0 - Annie Boyd scored a first-half goal and Danielle Williams added an insurance tally as the host Panthers held serve against the ninth seed. Annie Beato made 10 saves in the shutout.
No. 8 Pitman will play next at top-seeded St. Joseph.
Central Jersey Group 1
Heather Horner, Lexi Smith, and Sarah Spencer each scored as Florence beat No. 10 seed Gloucester Catholic, 3-1, in a first-round playoff game. The eventh-seeded Flashes will play at No. 2 New Egypt in the quarterfinals.
Holy Cross 3, Moorestown Friends 2 - Marissa Antuzzi scored twice as eight-seeded Holy Cross fended off visiting Moorestown Friends, the ninth seed, in overtime. Holy Cross will be at top-seeded Gloucester in the next round.
Central Jersey Group 2
Second-half goals by Jordan Freidrich and Jessie Mayer gave ninth-seeded Cinnaminson a 2-1, first-round win at No. 8 Ewing.
North Jersey Group 2
Jess Carey scored one of three second-half goals for Bordentown in a 3-2, comeback victory over visiting Kent Place in a first-round game. The eighth-seeded Scotties trailed, 2-0, at halftime.
Tri-County Classic. Salem goalie Tiasia Tatem made 17 saves as the Rams played Gloucester to a scoreless tie.
Nonleague. Arley Dannehower, Gianna Giacinto, and Kailey Stangle scored to lead Mainland to a 3-0 win at Cherokee, despite the best efforts of Chiefs goalie Sam Rubin, who made 24 saves.
Austyn Cuneo, Meredith Kalberer, and Madison Morano each scored two goals as Eastern downed visiting Ocean City, 8-1.
Christian Velasques scored an odd second-half goal, and visiting Lindenwold beat Haddon Heights, 1-0, for the first time in school history.
Velasques, a junior, took a shot from 20 yards with a defender right in front of him. The ball clipped the opposing player, which put an unusual spin on the ball and made it difficult for the goalkeeper to handle.
Luis Caraballo made 11 saves for the shutout.
Burlington County Patriot. John Fosbenner scored the go-ahead goal on a cross from the left side with 20 minutes remaining to give Palmyra a 2-1 win at Holy Cross.
Nonleague. Benny Gialloreto, who had a goal and an assist, was one of five Kingsway players to score in a 5-1 win over visiting Rancocas Valley.
Contact Tim McManus at email@example.com.