Another stated: I'm young, I'm growing. He officially weighed in at 132-pounds-2 pounds over weight.
Davis, who needed three attempts to make weight when he defended the IBF strap against Britain's Liam Walsh in London in May, tweeted an apology to his fans for missing the weight.
Pundits have since criticized Davis for not taking the fight against Fonseca seriously, which typically leads to a boxer not making weight.
In the seventh round, Davis' feet got tangled with Fonseca's leg and that allowed Fonseca to land a meaningful left hand.
Davis did a lot of taunting and fooling around in the ring against Fonseca.
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"Now he took advantage of this punch right here", Davis continued, apparently implying that Fonseca was exaggerating the effect of the back-of-the-head contact.
When Davis was announced as the victor, the crowd booed leaving Davis with a quizzical expression on his usually smiling face.
The victory came from a controversial call when the referee ruled what looked like an illegal shot to the back of the head to Fonseca as a knock down. But maybe he felt he didn't need his A-game to manhandle Fonseca, who appeared significantly smaller than Davis.
It is thought that Davis will have to move up to the same weight class as him however (super-featherweight) in his next fight after failing to make weight for tonight's bout. "I still want to unify the junior lightweight division". Either way, he told Twitter he plans on becoming a champion again very soon.
"I lost the belt not a fight".