How Patrick Mahomes went from a torn ACL and LCL to week 1 starter in just 9 months and why nobody should be surprised

Patrick Mahomes tore his ACL and LCL in his left knee on December 14, 2025, in a loss to the Los Angeles Chargers. Surgery followed within 24 hours. The Chiefs missed the playoffs for the first time since Mahomes took over as starter. For most quarterbacks, that sequence ends with a long, uncertain road back. For Mahomes, it became a nine-month project with one fixed destination in mind -- Monday Night Football against the Denver Broncos. Andy Reid confirmed it Tuesday: "Pretty good chance Patrick will go ahead and start, unless something were to come up here in the next couple days. But, most likely, he'll be the guy that's out there."How did Patrick Mahomes recover from a torn ACL and LCL so fast?The honest medical answer is that he didn't heal faster. He just got back to performance faster -- and there's a real difference between those two things.Rick Burkholder, the Chiefs' vice president of sports medicine and performance, addressed this directly after the surgery. "He's so regimented in what he does. He's in here at 6 a.m. He's the last guy out at night. He'll take the rehab like that. When you add up all the little things, that allows the player to get back faster. They don't heal up faster, they just get back to performance faster."Standard recovery for a combined ACL and LCL tear typically runs 12 to 18 months. Mahomes is doing it in nine. The surgery, performed by Dr. Dan Cooper in Dallas, confirmed no artery damage, no nerve damage, no meniscal damage. The injury was serious. The variables around it were as favorable as they could be. By March, just 100 days post-surgery, he was already posting throwing videos. By May, he was at OTAs. By mandatory minicamp in June, he was doing everything except 11-on-11 work. When training camp opened in late July, the Chiefs cleared him for full participation."I remember sitting on the table and watching us play those last few games, how much it hurt me," Mahomes said. "But I knew that if I continued to work I could be at this spot where I can get cleared for practice."He hasn't missed a single rep since.Did Mahomes actually look like himself in training camp?That was the real question all summer -- not whether he'd be cleared, but whether he'd look right. The answer, according to everyone who watched him work, was yes.Reid's assessment was blunt. "You guys have seen him out there, so you know what it looks like, him running around and doing his stuff. Other than having a brace on his leg, everything looks normal. He's running around the same way he's always done and throwing the ball like he's always done."Wide receiver Xavier Worthy put it even simpler: "Oh, he's back."Mahomes took every first-team rep throughout camp. He sat out the preseason entirely — a deliberate decision by the franchise to protect him and keep the knee fresh heading into September. The lack of preseason action raised eyebrows, but Mahomes had already accounted for that. "You just have to build that confidence back," he said in late July. "I didn't want to have to get only a couple of weeks of practice in and then have to go play a game. I wanted to build it up, see how training camp goes as we gradually build."That is not a man managing fear. That is a man managing a plan.What does Mahomes' return mean for the Chiefs and the 2026 season?Kansas City went 6-11 last season without him. The offense stalled, the playoffs were missed for the first time in the Mahomes era, and the conversation around the Chiefs shifted from dynasty to question mark. That changes Monday night. Mahomes returning to the starting lineup against Denver isn't just a feel-good moment -- it resets every projection about this team.The Chiefs signed running back Kenneth Walker in the offseason, Eric Bieniemy is back running an offense that produced Mahomes' best football, and the roster has been rebuilt around a quarterback who is, by his own admission, already thinking beyond Week 1. "The process isn't over," he told reporters at training camp. "It'll be something I'll probably be dealing with the next few years of my career and throughout the rest of my career." Then he added: "I feel amazing. I'm excited just to be able to play football."Mahomes is also the clear early frontrunner for Comeback Player of the Year -- before he has played a single snap. And his contract, recently extended through 2033 at a total value of $504.75 million, signals exactly where the Chiefs stand on their investment in him. He also comes in as the consensus pick for best quarterback in the NFL, according to the latest poll of coaches, GMs and executives by Albert Breer. Nine months removed from a destroyed knee, that is where Mahomes sits.Nobody who has watched him this offseason should be surprised.Get the latest Sports News and Live updates. Download the TOI app.