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While Seattle Seahawks cornerback Richard Sherman's postgame rant Sunday night in which he called 49ers receiver Michael Crabtree a "sorry receiver" was awfully entertaining, he also mentioned that Crabtree might have talked badly about him at some point.

Aside from Crabtree's refusal to confirm in the previous week that Sherman was the best cornerback in the league and aside from perhaps some on-field trash talking, it was hard to know exactly why the Seahawks cornerback felt so slighted.

The Seattle Times sheds light on an incident from last offseason in which Crabtree reportedly tried to start a fight while the two were at a charity event hosted by Cardinals receiver Larry Fitzgerald.

"While there, Sherman went to shake Crabtree’s hand, and Crabtree tried to start a fight, according to Sherman’s older brother, Branton," writes Jerry Brewer of the Times. "'I'm going to make a play and embarrass him,' Richard Sherman vowed that day."

I don't know if Sherman embarrassed Crabtree on Sunday, but Sherman certainly followed through on his promise to make a play.

"I was making sure everybody knew that Crabtree was a mediocre receiver. Mediocre," Sherman said in his postgame news conference. "And when you try the best corner in the game with a mediocre receiver, that's what happens. Game."

Crabtree responded that he was not a TV guy, unlike Sherman, and that Crabtree simply plays ball. "He made one play and he talks," Crabtree said. "It was a good play."

But Sherman isn't only a TV guy. He also pens an occasional column for theMMQB.com, and on Monday morning, he was in a writing mood.  

From his story about his reaction after he tipped the game-clinching interception:

I ran over to Crabtree to shake his hand but he ignored me. I patted him, stuck out my hand and said, "Good game, good game." That's when he shoved my face, and that's when I went off.

I threw a choking sign at 49ers quarterback Colin Kaepernick. Why? Because he decided he was going to try the guy he was avoiding all game, because, I don't know, he's probably not paying attention for the game-winning play. C'mon, you're better than that.

But that's not why I don't like the man. It goes back to something he said to me this offseason in Arizona, but you'd have to ask him about that. A lot of what I said to [Erin] Andrews was adrenaline talking, and some of that was Crabtree. I just don't like him. It was loud, it was in the moment, and it was just a small part of the person I am. I don't want to be a villain, because I'm not a villainous person ... To those who would call me a thug or worse because I show passion on a football field -- don't judge a person's character by what they do between the lines. Judge a man by what he does off the field, what he does for his community, what he does for his family.

That's only a small portion of what Sherman wrote, and I would advise you to read the entire piece, especially for his thoughts on 49ers linebacker NaVorro Bowman and his alleged treatment by some Seahawks fans.

Oh, and one other spoiler: Sherman doesn't much care for Crabtree.

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