CINCINNATI — Adam Dunn hit his first homer against his former team and the Washington Nationals beat the Cincinnati Reds 10-6 on Saturday night.

Alberto Gonzalez and Elijah Dukes each had two hits and three RBIs for the Nationals, who led 10-1 after four innings. Dunn led off the second with his 31st homer, walked twice and scored two runs.

J.D. Martin (2-2) cruised to his second consecutive win in his sixth career start, allowing an unearned run and six hits over six innings. The rookie right-hander was 0-2 with a 7.16 ERA before he pitched five solid innings against Arizona last Sunday.

Joey Votto had three RBIs and Drew Sutton hit his first career homer for Cincinnati, which got another lackluster start from Johnny Cueto. Willy Taveras had two hits and scored twice.

Cueto fell to 0-6 with a 10.64 ERA in his last eight starts as the Reds lost for the third time in four games. Cueto hasn’t won since beating Arizona 1-0 on July 1.

Dunn, known for his tape-measure shots to right field, started the second with a drive that barely reached the first row of seats in left field. It was his 125th homer at Great American Ball Park — the most by any player.

Dunn made his major league debut with Cincinnati in 2001 and was one of the club’s regular outfielders until he was traded to Arizona last August. He signed with Washington in the offseason.

Saturday’s Game

Nationals 10, Reds 6

Washington Cincinnati

ab r h bi ab r h bi

Morgan cf 5 2 2 0 Dickrsn rf 4 1 2 0

Bellird 2b 5 2 2 1 Tavers cf 5 2 2 1

Zmrmn 3b 5 1 2 1 Votto 1b 4 1 2 3

Dunn 1b 3 2 1 1 BPhllips 2b 2 0 0 0

Wlngh lf 3 1 1 1 Sutton 2b 2 1 1 2

WHarrs lf 2 0 0 0 L.Nix lf 4 0 0 0

Dukes rf 4 1 2 3 ARosls 3b 4 0 1 0

J.Bard c 4 0 0 0 Hanign c 3 0 0 0

AlGnzlz ss 5 0 2 3 Herrer p 0 0 0 0

JMartn p 4 1 2 0 Barker ph 1 0 0 0

Kensng p 0 0 0 0 Burton p 0 0 0 0

Clipprd p 1 0 0 0 Janish ss 3 0 0 0

SBurntt p 0 0 0 0 Cueto p 0 0 0 0

K.Wells p 2 1 1 0

Tatum c 2 0 0 0

Totals 41 10 14 10 Totals 36 6 9 6

Washington 016 300 000 — 10

Cincinnati 001 000 401 — 6

E—J.Martin 2 (2), Dukes (4). LOB—Washington 8, Cincinnati 7. 2B—Belliard (6), Alb.Gonzalez (13), Dickerson (13), Votto (18), A.Rosales (9). 3B—Dukes (2). HR—Dunn (31), Sutton (1).

IP H R ER BB SO

Washington

J.Martin W,2-2 6 6 1 0 1 1

Kensing 2-3 3 4 4 1 1

Clippard 1 2-3 0 1 0 1 2

S.Burnett 2-3 0 0 0 0 0

Cincinnati

Cueto L,8-10 2 2-3 8 7 7 0 1

K.Wells 4 5 3 3 2 5

Herrera 1 1-3 1 0 0 1 2

Burton 1 0 0 0 0 1

HBP—by J.Martin (B.Phillips), by Cueto (Dukes). WP—Cueto. Umpires—Home, Greg Gibson; First, Angel Campos; Second, Tim McClelland; Third, Andy Fletcher. T—3:14. A—30,494 (42,319).