When you watch this replay in live speed, you cant help but say "OH! What a hit!" It looks very violent. But football is a violent sport. I can understand why the referee threw a flag in the first place, but after conferring, this should be waived off. This is not a penalty by any means. In the replay you can see that Pollard's helmet hit the bottom of Karim's helmet. However, you cannot say that this was a helmet to helmet hit. This was a pure textbook tackle on a receiver.
Some people are talking about possibly allowing video review for hits such as these. This would allow the officials to view the hit from multiple angles to determine if the hit was indeed malicious or "illegal." The emphasis on protecting players is putting officials in a position where they almost certainly have to call anything an illegal hit that looks close to being malicious.
While I am not saying the NFL is wrong to put emphasis on player safety, something has to be done to eliminate the chance of a call like this changing the path of a game. This penalty was called in the second half of a 6-0 game in Jacksonville's favor. Instead of punting, Jacksonville was able to take another 6 minute chunk out of the game and score to go up 9-0. Had this call not been a penalty, Baltimore would have gotten the all back and the game could have swung in favor of the Ravens.
What do you think about the hit? Was it illegal or malicious and did it warrant a 15 yard personal foul penalty?