Patrick Mahomes found himself under fire from fans after what appeared to be a routine play ended with the Kansas City Chiefs quarterback hitting an opponent as he went out of bounds.The Chiefs started the third quarter of their season opener on Friday trailing the LA Chargers 13-6, and Mahomes single-handedly took them to the end zone. At 10:00 in the third quarter, the three-time Super Bowl champion ran the ball and got the first down for his team. While exiting the field, Mahomes hit defensive back Donte Jackson with his shoulder.Mahomes wasn't penalized, but many fans didn't appreciate the Chiefs star being extra physical with an opponent who assumed he would just exit the field. Some even accused the referees of favoring Kansas City."This is total BS, if that DB hits Mahomes he gets a flag and fine," one fan said. "He could have just walked out of bounds like that DB assumed he would do. If QBs are going to do shit like this they should get rocked even when they look like they are going out of bounds."The Voice of Reason @reasonlockerLINKThis is total BS if that DB hits Mahomes he gets a flag and fineHe could have just walked out of bounds like that DB assumed he would doIf QBs are going to do shit like this they should get rocked even when they look like they are going out of bounds"Refs working overtime for the chiefs," another fan said.johnny 5 @kzcvr2hkpddLINKRefs working overtime for the chiefs #KCvsLAC"Yeah, Mahomes is getting dirty with the sideline stuff and abusing rules. The defender clearly let up, trying not to get a flag for wiping him out, and he then took advantage to light the guy up. This should be a message to all teams. Greenlight to unleash on him," another fan said.JonnydelsFA @jonnydelsLINKYeah, Mahomes is getting dirty with the sideline stuff and abusing rules. The defender clearly let up, trying not to get a flag for whiping him out, and he then took advantage to light the guy up. This should be a message to all teams. Greenlight to unleash on him.Fans criticized the referees, saying they would have acted differently if Mahomes were the one being hit."Should be a flag on Mahomes. Prances toward the sideline then lowers his shoulder into the guy. lol give me a break," one fan said."The defender let up so he doesn’t get a flag and Mahomes throws the shoulder Say what you will, but if the defender hit Mahomes there would be flags all over the place," another fan said."If he was tackled, refs would have thrown a flag. Mahomes being #Mahomes is not a shock at all, but hate it for the defense. If these QBs aren’t supposed to be tackled, they shouldn’t be allowed to lower the shoulder either as they run out of bounds," another fan wrote.Former Packers QB Kurt Benkert rips Patrick Mahomes for shoulder hit on Chargers DBPatrick Mahomes also received heat from former Green Bay Packers quarterback Kurt Benkert. He called out the referees and Mahomes, saying the Chiefs QB shouldn't get any flags if he oversells a play in the future."I don’t want to see a single flag thrown this year when he flops out of bounds," Benkert wrote.Jim Harbaugh's Chargers held off Mahomes and the Chiefs in São Paulo, Brazil, to win the game 27-20.