updated 12:14 p.m. ET Nov. 13, 2008

DENVER - Violence is inherent and celebrated in the NFL, from video games to dozens of "greatest hits" videos.

More and more, however, the hard hits are being viewed by the league in a much different light. The weekly list of those being fined up to $50,000 (40,000 euros) for a hard hit — whether it drew a penalty or not the previous Sunday — is getting more attention than ever.

It's confusing lots of players, too.

"I don't know what a bad hit is," said Adrian Wilson of the Arizona Cardinals, fined $25,000 this season for a hit that knocked Buffalo Bills quarterback Trent Edwards out of a game — the very thing some defenders see as part of their job.

"You know, it's football, and to me, every hit could be scrutinized, regardless of whether it's a legal hit or an illegal hit," Wilson said.

A week ago, Justin Tuck of the New York Giants was penalized for a hard sack on Brooks Bollinger because he put the full force of his body into slamming the Dallas Cowboys quarterback to the ground. Even Ron Jaworski, a former quarterback and longtime advocate of quarterback protection, said he thought that was a little ridiculous. The NFL fined Tuck $7,500 but later rescinded the fine when the commissioner looked at the tape.

It was yet another decision that raised as many questions as it answered.

The NFL, seriously contemplating adding two games to make it an 18-game season in which player health would be jeopardized even further, realizes what a big investment it has in these players.

Commissioner Roger Goodell is on a crusade to clean up the image of its players and the game. A league that sometimes seems almost too perfectly sanitized and on-message could be moving toward alienating its players and policing out of the game one of the very things that made it popular in the first place: The bone-crushing tackle.

Under current rules, Chuck Bednarik might have owed huge money after leveling Frank Gifford, then glowering over him — one of the iconic images in the NFL's long and often violent history. That blindside hit in 1960 was deemed legal. Still, Gifford missed a year and a half, and his career was shortened because of the hit. Bednarik's celebration was thought by most to be over the top.

And what about Hall of Famer Lawrence Taylor? The Giants linebacker who victimized almost every quarterback of a certain vintage certainly would have written his fair share of checks.

"The game has changed," Miami Dolphins linebacker Joey Porter said. "It softens up the game a lot. Everyone feels the same way. Everyone on defense at least. And we have no control over it."

As of late October, the NFL had levied 139 fines for a variety of reasons, including illegal and dangerous hits. Though the league did not offer any statistical updates, breakdowns or comparisons to previous years for this story, it appears to be putting teeth into Goodell's early season reminder to players and teams. In a letter sent to all the teams warning of a crackdown on hard hits, he said that even first-time offenders would be subject to fines for illegal hits.

"From this point forward, you should be clear on the following point: Any conduct that unnecessarily risks the safety of other players has no role in the game of football and will be disciplined at increased levels, including on a first offense," Goodell wrote.

An NFL spokesman said that historically, there are about 20 fines a week for illegal hits out of about 2,300 plays (153 per game).

The spokesman said hits that are clearly against the rules and dangerous are the only ones that result in fines, and that players and coaches receive detailed information each year defining illegal hits.

Video   Jim Brown: Rules are too harsh on hitters Hall of Famer Jim Brown says the league is overreacting to hard hits. NBC Sports

While the NFL says the rules are well-defined, many players and even teams fail to see the clarity.

The oddest thing is that a number of fines this year have come on plays that weren't penalized on the field. That happened twice, in successive weeks, to Hines Ward of the Pittsburgh Steelers, long known as one of the best blocking receivers in the league.

The Steelers, feeling they were singled out after having players fined four times for a total of $50,000 in two weeks, had a meeting with NFL executive vice president Ray Anderson to clear the air.

Slide show Memorable hits Take a look at some of the biggest hits and hardest hitters in NFL history. NBCSports.com

"It's becoming more and more flag football, two-hand touch," Steelers safety Troy Polamalu said in a statement that helped trigger the meeting with the NFL. "We've really lost the essence of what real American football is about. They're not really concerned about safety, because people have been doing this for ... quite a few decades."

The confusion has reached the point where the players' union is considering stepping in, asking for a new process to appeal NFL fines as part of a new collective bargaining agreement.

"It is clear from our ongoing team meetings that players see league discipline as becoming more and more excessive, and that the best way to address the problem is to insist that the next CBA require neutral arbitration for league discipline," said a statement on the union Web site.

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