NFL refs have a tough job to do. The NFL makes it even tougher by constantly changing the rule book.

Is the receiver defenseless? Does he maintain control throughout the process of the catch? Was that a football move? What is a football move? Was that the crown of the helmet? Is that a blindside peel-back block?

Some calls are so obviously wrong that I wonder when coaches are going to have the ability to challenge everything.

Adam Hoge of Chicago's 87.7 The Game shared the two illegal "blindside blocks" on Twitter that were called against the Bears. He also shared a clip of another block, this one by Carolina's Cam Newton, that looks very similar to one called against the Bears. He wasn't flagged however.

Here's the first "illegal bock."

<blockquote class="twitter-tweet" lang="en"><p>The only way this is a "blindside block" is if Panthers safety Thomas DeCoud is actually blind. <a href="https://t.co/M86XNJGGp0">https://t.co/M86XNJGGp0</a></p>— Adam Hoge (@AdamHoge) <a href="https://twitter.com/AdamHoge/status/519116534481182720">October 6, 2014</a></blockquote>

<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

Notice how Thomas DeCloud braces himself for impact. He saw the block coming, but the ref called it a blindside block.

Here's the second block, this one is even more maddening.

<blockquote class="twitter-tweet" lang="en"><p>Here's the second "blindside" block, which the refs called on Alshon Jeffery even though it was Brandon Mar... <a href="https://t.co/pRHiAAC1V8">https://t.co/pRHiAAC1V8</a></p>— Adam Hoge (@AdamHoge) <a href="https://twitter.com/AdamHoge/status/519124787395043329">October 6, 2014</a></blockquote>

<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

You've gotta be kidding me.

Marshall was leading the play, he came off one block to make another. If lead blockers aren't able to block anymore, this is no longer football. That's just a good old fashioned decleater.

The blindside block rule can be found under Article 9 in the unnecessary roughness section of the NFL rule book. Here's the snippet from that section.

Article 9 It is a foul if a player initiates unnecessary contact against a player who is in a defenseless posture. (a) Players in a defenseless posture are: ... (8) A player who receives a "blindside" block when the blocker is moving toward his own endline and approaches the opponent from behind or from the side.

I understand the spirit of the rule, but when a defender sees a block coming how can it be blindside? Also the Marshall block wasn't a blindside or a peel-back type block.

Just for comparisons sake, here's the Newton block that didn't draw a flag.

<blockquote class="twitter-tweet" lang="en"><p>Meanwhile, this wasn't called a "blindside block" even though Cam is moving toward his own endline and hits... <a href="https://t.co/RfJQcZjizu">https://t.co/RfJQcZjizu</a></p>— Adam Hoge (@AdamHoge) <a href="https://twitter.com/AdamHoge/status/519128603490275329">October 6, 2014</a></blockquote>

<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

That play looks familiar.