The Jaguars defeated the Saints 27-24 Friday night in New Orleans to start the preseason 2-0 for the first time since 2005.

Here's a look at who helped their cause and who struggled in the Jaguars' win.

Stock up:

1. QB Blaine Gabbert: For a QB who struggled with accuracy in 2011, Gabbert looks like a new player in the preseason. He was 13 of 16 for 112 yards and two touchdowns Friday night. That puts his preseason line at 18 of 26 for 175 yards and three touchdowns. Coach Mike Mularkey has done wonders for the second-year QB in a short amount of time.

2. WR Justin Blackmon: The No. 5 overall pick in the 2012 draft made his much-anticipated debut Friday. He didn't disappoint. He wasted no time, scoring on a 16-yard catch on his first drive as a pro. Blackmon finished with four catches for 48 yards. He appeared to have a good grasp of the offense despite missing more than a week of training camp.

3. RB Rashad Jennings: Maurice Jones-Who? Jennings isn't that good yet, but he's done nothing but impress in the preseason. Nobody is honestly suggesting that he's better than Jones-Drew at this point, but Jennings had another solid night Friday, rushing for 62 yards on 17 attempts. He has 118 yards on 29 carries in two preseason games. He was especially impressive on the first drive against the Saints' first-team defense, breaking loose for runs of 15 and 17 yards.

Stock down:

1. RB Maurice Jones-Drew: Every successful game Jennings has takes away leverage from Jones-Drew. It's not just Jennings, though. The impressive debut of Blackmon and the development of Gabbert means the Jaguars have more than one offensive option. MJD might want to think about packing his bags for camp soon.

2. WR Laurent Robinson: While Blackmon stepped up, Robinson didn't have any receptions Friday night. The Jaguars' biggest free-agent acquisition has one catch for seven yards in two preseason games. He's had his moments in practice and laid some good blocks on the perimeter, but the Jaguars didn't pay him $32.5 million to be a good run blocker. 

3. DE George Selvie: DEs Jeremy Mincey and Andre Branch are seperating themselves from Selvie and the other ends. With veteran Austen Lane out with an injury, Selvie was one of the contenders for the spot opposite Mincey, but Branch, the team's second-round pick out of Clemson, has looked impressive in two preseason games. Selvie now finds himself on the bubble of making the roster.

For more news and analysis of the Jaguars, follow Daniel Lewis @CBSSportsNFLJAC