METAIRIE - The New Orleans Saints have had one of the best offensive lines in the NFL since Sean Payton arrived back in 2006, and the unit is a big reason why the team has had so much success during that time.

Last year, however, the group struggled, and now Pro-Bowl tackle Terron Armstead is leaving for the Miami Dolphins.

The Saints are hoping that rookie and first-round draft pick Trevor Penning can ease some of those concerns. 

"He's out here working extremely hard. I see a really big man that's got some really good athletic qualities," said head coach Dennis Allen. 

"I mean, it's just a lot of technical stuff that I wasn't learning in college, and over time you get to learn, you start doing a team period and get more confident in your ability," Penning said. 

The team also hired former NFL head coach Doug Marrone to be the team's offensive line coach. Marrone was a part of Sean Payton's original staff back in 2006.