No one team has been affected more in free agency than the Super Bowl champion Baltimore Ravens. The Ravens will look vastly different when they take the field this fall, especially on defense. Other teams that have seen a lot of roster turnover and have struggled to find suitable replacements through free agency include New England, the New York Jets, Oakland and Pittsburgh. Buffalo and Cleveland both have new coaching staffs and front offices running things, so change is inevitable and part of the process.

This is your daily link roundup of our favorite sports posts on the web for March 29.

This is your daily link roundup of our favorite sports posts on the web for March 22.

• Bleacher Report gives us the 60 hottest fanbases of March Madness. I feel sorry for the eight schools that got left out.

The NFL’s new league year officially begins today. The more prominent indicator that business has begun for the 2013 season is the start of free agency at 4 p.m. ET. While some teams have already made several moves, with more than 500 players on the market, the activity will really pick up starting later today.

While the 2013 NFL season may not start on the field for another six months, the off-the-field business begins in earnest on Tuesday when the new league year officially begins. More specifically, the action will really heat up when free agency commences at 4 p.m. ET.

The Baltimore Ravens and their fans are more than likely still basking in the glow of their Super Bowl XLVII win, but as far as the NFL goes, it’s pretty much ancient history.

The new NFL league year officially begins at 4 p.m. ET on Tuesday, which also marks the opening of free agency. About 550 players have been designated as either restricted or unrestricted free agents, so it goes without saying that all 32 teams, including the reigning champs, have plenty of work to do.

Each year a unique set of prospects enters the professional ranks with a chance to make an immediate impact on the country's most powerful sport. The 2013 NFL Draft, held April 25-27, won’t be any different. Georgia's Jarvis Jones leads a fairly deep class of athletic defenders who should be capable of contributing on the next level.

Each year a unique set of prospects enters the professional ranks with a chance to make an immediate impact on the country's most powerful sport. The 2013 NFL Draft, held April 25-27, won’t be any different. The best inside linebacker prospect might be the most covered, most scrutinized prospect in the entire draft. Manti Te'o heads a class that isn't all that deep but has some elite playmakers at the top of the board.