Cam Newton didn't disappoint on the first day of his new job ... the NFL MVP trolled new co-worker Shannon Sharpeover his Instagram Live sex sesh with "Michelle"!
ESPN recently hired the former All-Pro signal-caller to sit opposite Stephen A. Smith and Sharpe on "First Take" ... and he made his debut on Friday for their HBCU road show.
Newton -- who already has a popular podcast, 4th&1 -- and the crew were discussing Smith's top five homecoming essentials, from the band to Greek life.