Not this again...
GSP won 2 rounds.
Hendricks won 2 rounds.
Round 1 is the only controversy; GSP had a sub attempt and Hendricks had a TD, depending on which should be worth more, that person wins Round 1. That being said, don't expect to take the belt BARELY winning 3-2 rounds, you have to either finish the champ or DOMINATE (which Hendricks didn't). GSP rightfully remained champ.
And for those saying GSP left the sport... yeah the guy was on a 9 title run and seemed pretty burned out from the constant Spotlight. He came back and beat the champ from the class above with a finish after 4 years out.
GSP is the greatest of all time by a landslide... I honestly believe that anyone who says otherwise doesn't know anything about MMA. Show me one fighter with a better resume: 26-2, beat every man he has faced, most top 5 wins in history, most top 10 wins in history, dominated 3 generations of fighters, 9 title défenses, lineal WW champ, lineal MW champ, crusader against PEDs.
Jones, Silva, Fedor, DC, MM, Khabib are all great, but they also have blemishes like abusing PEDs, string of losses, not enough title défenses, or not fighting great comp, GSP literally has it all.