WASHINGTON — The calendar says it's August and, thanks to Justin Upton's tiebreaking homer Monday night, the Atlanta Braves are 13½ games ahead of the Washington Nationals in the NL East. "I thought," Braves manager Fredi Gonzalez said, "that the division was going to be a lot closer." Upton led off the eighth inning with his 20th homer, and Atlanta extended its winning streak to a season-high 11 games by beating fading Washington 3-2.