Blaine Gabbert was carted off the practice field on Monday with a sprained ankle.

Gabbert injured the ankle during 11-on-11 drills and will be evaluated over the next few days.

Chad Henne will have an opportunity to emerge as the starting quarterback of the Jacksonville Jaguars in Gabbert's absence.

The Seattle Seahawks have the most talent in the NFL of players 25-and-under.

The Houston Texans were ranked first in 2010, while the Tampa Bay Buccaneers had the distinction in 2011 and the New England Patriots last season.

The Seahawks feature Russell Wilson, Russell Okung, Richard Sherman, Earl Thomas and Kam Chancellor.

The San Francisco 49ers rank second with Colin Kaepernick and Aldson Smith headlining.

The Cincinnati Bengals, Washington Redskins and Green Bay Packers round out the top-five.

6. St. Louis Rams
7. Tampa Bay Buccaneers
8. Carolina Panthers
9. New England Patriots
10. Indianapolis Colts
11. New York Jets
12. Cleveland Browns
13. Denver Broncos
14. Tennessee Titans
15. New York Giants
16. Houston Texans
17. Dallas Cowboys
18. Minnesota Vikings
19. Miami Dolphins
20. Pittsburgh Steelers
21. Kansas City Chiefs
22. Detroit Lions
23. Philadelphia Eagles
24. Atlanta Falcons
25. Arizona Cardinals
26. Baltimore Ravens
27. Buffalo Bills
28. Chicago Bears
29. New Orleans Saints
30. San Diego Chargers
31. Jacksonville Jaguars
32. Oakland Raiders 

Maurice Jones-Drew has been cleared to practice.

Jones-Drew missed 10 games last season after suffering a Lisfranc injury in his foot.

The Jacksonville Jaguars have a new offensive coordinator in Jedd Fisch.

Jaguars receiver Justin Blackmon is recovering from groin surgery, according to an ESPN.com report on Friday.

Blackmon, limited during last month's three-day minicamp because of a nagging groin injury, had surgery recently but could be back in time for training camp.