Bobby Boswell and Rob Vincent added goals to help United (11-9-13) win its fourth straight.
City (14-10-9) was eliminated from the Supporters' Shield race and fell three points behind the New York Red Bulls for the top seed in the East.
United opened the scoring in the 27th minute when Lloyd Sam sent in a low cross and Luciano Acosta deflected it through to Mullins for the finish. Boswell headed home Sam's corner in the 31st and Vincent capitalized on a defensive miscue in the 45th.
David Villa scored for NYCFC on a penalty kick in the 72nd minute — his 22nd of the season. But he dropped a goal behind Bradley Wright-Phillips in the Golden Boot standings after Wright-Phillips added two goals to his tally Sunday.
NBA: All-Star center DeMarcus Cousins scored 22 points and had five rebounds and six assists as the host Sacramento Kings (3-2) beat the Washington Wizards (2-3), 124-119, in a preseason game on Saturday night. Point guard Darren Collison finished with 22 points on 7-for-11 shooting and added eight assists for the Kings. Seven Wizards players scored in double figures, led by Andrew Nicholson's 19 points. Trey Burke added 14 points and 10 assists for Washington.
College football: Frostburg State sophomore running back Jamaal Morant (Milford Mill) was named Offensive Player of the Week, Frostburg State freshman linebacker Monte Jones (St. Mary's) was picked Defensive Rookie of the Week and Salisbury senior returner Aarron Moore was selected Special Teams Player of the Week by the New Jersey Athletic Conference.
Men's college soccer: Freshman Brian Saramago scored two goals in the opening 16 minutes to help first-place Loyola Maryland (6-5-2, 4-0-1 Patriot League) to a 2-1 win over visiting Lehigh (4-8-1, 1-4) on Saturday night. The Greyhounds extended their unbeaten streak to seven games. ... Zack Rockmore scored in the 90th minute Saturday night to give visiting Bucknell (5-8-2, 2-2-1 Patriot) a 2-1 victory over Navy (3-7-3, 0-4-1).
Women's college soccer: Marissa Borsch scored on a header off a corner kick in the 34th minute to lead Indiana (7-7-3, 4-3-2 Big Ten Conference) to a 1-0 victory over host Maryland (3-13-1, 1-8-0) on senior day. … Towson's Marissa Green scored in the 83rd minute, but it wasn't enough to overcome two goals in the first 48 minutes by Charleston (10-6-1, 3-3-1 Colonial Athletic Association) as the host Tigers (6-10-1, 3-4) fell, 2-1. … Stony Brook (8-7-2, 5-1 America East Conference) scored on a penalty kick in the second half to earn a 1-0 win over host UMBC (5-9-1, 1-4-1). … Freshman Cadie Higginson scored the winning goal in the 106th minute to help visiting Navy (7-8-3, 3-2-1 Patriot) to a 4-3 win over Colgate (5-7-3, 2-4) on Saturday.
College field hockey: Grace Balsdon's penalty stroke in the 59th minute lifted No. 6 Maryland (12-3, 6-1) to a 5-4 win over host No. 5 Penn State (12-2, 4-2), helping the Terps clinch at least a share of the Big Ten championship. Maryland can clinch the title outright with a win in its final conference game against Rutgers on Oct. 29.
Women's college volleyball: Junior middle blocker Hailey Murray had nine kills but host Maryland (8-12, 0-8 Big Ten) fell to No. 2 Nebraska (16-1, 8-1) in three sets, 25-16, 25-14, 25-17. Freshman outside hitter Gia Milana led the match with 11 kills while sophomore libero Kelsey Wicinski had a match-high 11 digs. … Four players combined for 48 kills as host Towson (18-5, 5-3 CAA) earned a three-set victory (25-13, 25-16, 25-22) over William & Mary (8-13, 2-6). Senior Lindsay Flaherty finished with three blocks, becoming the sixth player in Tigers history to record 400 or more blocks with 402.