Cam Newton honors Peyton Manning on Instagram, but capitalizes 'HGH'

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Peyton Manning earned victories over all 32 NFL franchises in his 18-year career, with his final win coming over the Carolina Panthers in Super Bowl 50.

The losing quarterback in that game, Cam Newton, took to his Instagram page Monday to express his gratitude to Manning upon the latter's retirement.

At least, that's what it appears Newton did. Curiously, the reigning NFL MVP twice capitalized the letters HGH in the word "high."

Newton frequently uses unique capitalization in his Instagram captions, so this is probably a coincidence ... right?

An Al Jazeera report alleged Manning used HGH (Human Growth Hormone) in 2011.