The New Orleans Saints improved to 7-2 with a Sunday Night Football victory over the Dallas Cowboys, but suffered a loss as well, as rookie safety Kenny Vaccaro will be out for Week 11 after suffering a concussion, according to Ian Rapoport of NFL.com.

Vaccaro, 22, has started all nine games for the Saints as a rookie after he was selected in the first round of the 2013 NFL Draft. He has managed one sack and one interception for the team, while racking up 45 tackles and five passes defended. Vacarro left Sunday's game after taking a knee to the helmet.

After finishing the 2012 season with one of the worst defenses in NFL history, the Saints have made tremendous strides and have allowed the fifth-fewest points per game in 2013. The Saints are also one of only three defenses that have allowed fewer than 200 passing yards per game since the addition of Vaccaro.

In Vaccaro's absence, the Saints will likely start Rafael Bush, who played in relief of the injured rookie on Sunday night. An undrafted free agent in 2010, Bush has appeared in 31 career games and has started five times for the Saints in 2013.

The Saints are set to host the visiting San Francisco 49ers on Sunday.

More from SB Nation NFL

• Takeaways: Fear the Panthers! Updated playoff picture

• Dr. Ali: Manning, Cutler, Locker land on injury report

• Richie Incognito defends actions in interview | More on Miami's mess

• Watch A.J. Green's last-second Hail Mary TD | Ravens still win in OT

• Terrell Pryor reaches JaMarcus-level low point