Matthews has endorsement deals not only with Gillette, but also with Nike, Verizon, Muscle Milk and Fathead.

FORBES: Building The Clay Matthews Brand

Some of my other deals are just fun, like my Fathead one.

FORBES: Building The Clay Matthews Brand

He also endorses Titleist, Schuco, Oakley, EA Sports, Audemars Piguet and Fathead.

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But the population plunged in the smallest fish species, the fathead minnow.

ECONOMIST: Human contraceptives are bad for fish

After two years of treatment, the fathead minnow population collapsed.

ECONOMIST: Human contraceptives are bad for fish

Meanwhile, aliens including fathead minnows, channel catfish and common carp, which would have been hard put to survive in the savage waters of the undammed canyon, have moved in.

ECONOMIST: Flooding the Grand Canyon

You can enter to win a dry erase calendar set (or other funky design) found here at WallPops (no Fathead or Euro for purposes of the giveaway due to license restrictions).

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