WASHINGTON, Jan. 12 (Ticker) -- The Washington Wizards built a double-digit lead with steals and fast-break baskets. Gilbert Arenas gave them the win in similar fashion.

Arenas made a steal and breakaway dunk with 20 seconds to play, lifting the Wizards to their fifth straight win, a 104-100 victory over the Portland Trail Blazers.

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"It was a play that if I made it, I looked good, if I missed it, they would have a wide open shot," Arenas said. "I went on instinct, and it worked out for us."

Arenas and Larry Hughes scored 26 points apiece for Washington (20-13), which is seven games over .500 for the first time since January 30, 1985. The Wizards completed a perfect five-game homestand and have won five in a row.

"We had five teams come in here, with five different styles," Hughes said. "We adjusted and found a way to get it done."

A tough driving layup by Arenas over Theo Ratliff gave Washington a 99-98 lead with 24 seconds remaining and forced Portland to call its final timeout. On the ensuing inbounds play, Richie Frahm threw a lazy pass that Arenas picked off before going in for a dunk.

Damon Stoudamire missed a 3-pointer and Hughes made 3-of-4 free throws to seal the win.

"We made a couple of mental mistakes at the end that cost us," Portland coach Maurice Cheeks said. "You have to give them credit. They made the shots at the end that enabled them to win the game."

In November, Arenas saw Philadelphia's Allen Iverson step in front of him, steal an inbounds pass and streak in for the game-winning layup at the overtime buzzer. This time, he was handing out the heartbreak.

"It always comes back around," he said. "We got beat on a play like that and it was a game-winner. We still had to make some free throws to get the win, but we felt good about it."

Arenas made 11-of-16 shots, including four 3-pointers, and had five assists and two steals with zero turnovers. Hughes made 10-of-20 shots and had nine assists and six steals. The backcourt duo fueled a big third quarter that included 12 fast-break points, many coming off steals.

"Our defense is a big part of our offense," Hughes said. "Our guards can rebound and make steals and start the break from there. That's a key for us."

Washington held an 85-73 lead with 8:04 left before Portland put together a 15-3 run that featured 3-pointers by Nick Van Exel, Stoudamire and Frahm. Stoudamire's lay-up gave the Trail Blazers a 90-89 edge and was the first of six lead changes in the final period.

"For some reason the last couple of minutes is when we dig down," Arenas said. "There's no panic. It's just that if we don't stop them in the first 47 minutes, we have to do it for the last one."

"We don't worry," Hughes said. "We always think that we can get a stop and make a play."

A scoop shot by Antawn Jamison gave the Wizards a 95-90 lead with 1:59 to go before Van Exel drilled consecutive 3-pointers to give the Blazers a 96-95 lead with 1:04 left. Hughes and Ratliff traded baskets to set up Arenas' heroics.

Stoudamire had 23 points and seven assists and Van Exel scored 19 points for Portland, which fell to 1-2 on its six-game road trip. The Blazers played the second half without leading scorer Zach Randolph, who suffered a leg strain.