KANSAS CITY, Mo. — Kansas City Chiefs offensive coordinator Eric Bieniemy was done with the mistakes.His players failed to line up correctly during Wednesday’s practice at organized team activities, so instead of wasting more time, he screamed at the first-team offense to get off the field — a group that included quarterback Patrick Mahomes.The second team ran on, and Bieniemy later explained to reporters that his tough-love approach was meant to be a lesson.“The little things become a big thing, because we’re not overcommunicating with each other, now there’s a problem, within the huddle, and that impacts everything,” Bieniemy said. “So you know what? You kick them off the field.”It’s been far from the only sign during workouts that Bieniemy has returned as offensive coordinator after three years away from K.C.Running backs are instructed to finish most runs and routes in the end zone, which is sometimes 50 yards away. The exercise is meant to emphasize the value of finishing plays.Bieniemy’s booming voice is also difficult to miss, whether he’s celebrating a touchdown catch or demanding that players get lined up quicker out of the huddle.“I don’t know if I bring energy, I just enjoy what I do. It’s fun,” Bieniemy said Wednesday. “It’s always a challenge. But more than anything, the expectations have always been high, and I expect our guys to perform at a certain level.”And while Bieniemy has had three different stints since he left Kansas City — serving as offensive coordinator for the Washington Commanders and UCLA Bruins and running backs coach for the Chicago Bears — he said Wednesday he didn’t envision his primary purpose with the Chiefs was as a messenger of new ideas.Instead, it was about getting the Chiefs back to the standard that has helped them win Super Bowls.“I know this sounds very high school-ish, this answer I’m about to give you,” Bieniemy said. “We’ve got to get back to doing the fundamental things the right way.”He had some examples ready, too.Bieniemy said the Chiefs need to emphasize their footwork detail, from offensive linemen to quarterbacks to running backs. They needed to be more detail oriented on blocks, too, playing with flat backs with explosion off the snap.“There’s no big picture right now,” Bieniemy said, “if we can’t get off the ball and block somebody.”Receivers are also a focus, with Bieniemy wanting his guys to run patterns with purpose. Wideouts shouldn’t just go through the motions on routes; they should have a plan to beat specific coverages.Bieniemy knows this all sounds like elementary stuff. But it’s hidden in those basics where he believes games are won and lost each week.The message certainly is one that could be embraced by these Chiefs, who went 1-9 in one-score games last season.“If we can’t do those things the right way, it don’t matter who the hell we play,” Bieniemy said. “So we’ve got to make sure we address those issues and get back to the bread and butter of how this game was played.”Some players have already spoken this offseason about Bieniemy not letting little things slide.That includes free-agent running back signing Kenneth Walker III, who said during a video interview with Kay Adams last month that Bieniemy was already pointing out small mistakes from the first night they spoke.“We were just meeting up, going to dinner. He was talking about stuff that I did wrong on the field and everything I need to be detailed at,” Walker told Adams. “I knew what I was getting into when I met him. He wants the best for everybody, but he’s got high standards. That’s good if you want to be better.”Chiefs second-year left tackle Josh Simmons also referenced Bieniemy in a recent video breakdown with O-line analyst Brandon Thorn. The two were critiquing one of Simmons’ pass sets a year ago against New York Giants pass rusher Brian Burns, where Burns pushed Simmons back far enough to create a QB pressure on Mahomes.On rewatch, Simmons diagnosed that if he had spaced out better next to left guard Kingsley Suamataia before the snap, he would’ve had a better chance at effectively blocking Burns.“It’s those little details,” Simmons said, “Bieniemy kind of likes to scream about.”Mahomes said in late May that he has appreciated Bieniemy’s return to meeting rooms. The coach’s confidence comes across in presentations, Mahomes said, and that swagger has led to greater focus on his instructions.“It’s been exciting to me,” Mahomes said. “That first meeting had me wanting to run through a brick wall.”Bieniemy hasn’t wasted time in setting his expectations. OTAs are voluntary, and they’re lighter practices compared with what the team will face when training camp begins this summer.The standard remains the standard, though. Which means Bieniemy doesn’t believe this is the time to ease up — or expect any less from his guys.“We can’t get comfortable being comfortable,” Bieniemy said, “and not enjoying the fundamentals that we have to work on every single day.”