KANSAS CITY, Mo. — There’s a video a couple of years old floating around the internet that shows Patrick Mahomes, then the quarterback at Texas Tech, dropping to his knees and flinging a football 65 yards on a dare.

That answered any questions about his arm strength.

What wasn’t answered during all those years with the Red Raiders was whether that rocket arm could deliver the ball consistently on point.

Yes, Mahomes threw far fewer interceptions than most folks recall, especially given the number of pass plays Texas Tech calls each game, but most cynics figured he would toss about as many picks as touchdown passes once he arrived in the NFL.

He answered that question last week against the Chargers, when he threw for 256 yards and four TDs without an interception in his first game as the Chiefs’ full-time starting quarterback.

“He did a nice job, and now you have to back it up,” Chiefs coach Andy Reid said Wednesday. “He understands that. He’s wired that way. Plenty of room to improve and he knows it. He’s working at it.”

Such as sliding when he’s under pressure, rather than taking a big hit. Mahomes absorbed far too many of those against the Chargers, and the Pittsburgh Steelers’ ferocious defense no doubt is licking its chops at the thought of delivering another crunching blow on Sunday.

But when it comes to throwing passes into double coverage, or taking a gamble that results in a costly turnover, at least for one week Mahomes was perfect.

“Good and bad, you lean from both of those. But he made some nice decisions,” Reid said. “There’s some things he can go back and look at and say, `I should have gone there.’ That’s in the memory bank and he’s building that file.”