There's a video a couple of years old floating around the internet that shows Patrick Mahomes Alex Smith Jersey , 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.And it's hard to get much better than 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. I thought he did a good job of not throwing it to them, but there are some things he could do better against certain looks."Reid wouldn't go into details, of course, lest he gives the Steelers any unnecessary advantage. But whether it was a quick-flip pass to Tyreek Hill that resulted in a long touchdown, or a touch throw down the sideline to Anthony Sherman for another score, Mahomes never put the ball in too much danger.More than all those throws he made, it was the throws he didn't make in the 38-28 victory that helped Mahomes win this season's first AFC offensive player of the week award."It helped that I had a lot of guys that played well for us in the offense," Mahomes said. "Tyreek had a great game, the offensive line played really well. I'm glad I got the honor, but it was kind of an offensive unit honor."It's hard to gauge the growth in Mahomes from last year to this year Josh Norman Jersey , given how little he played as a rookie. But offensive lineman Mitchell Schwartz said it's evident in all aspects of his game, whether it was the way Mahomes approached offseason workouts or the way he operates in the classroom."There's definitely a comfortability with everything," Schwartz said. "There's been a huge progression from him and it's been cool to see."Just as Reid said, though, now Mahomes needs to back up his Week 1 performance.The Steelers present a much more complex test for Mahomes with a variety of disguised blitzes that have frustrated Chiefs quarterbacks for years.Even the cerebral Alex Smith, the consummate game-manager quarterback, struggled to have much success against Pittsburgh during his years in Kansas City."I feel like I get better and better with blitz protections every week. It helps that we have good game plans," Mahomes said. "I know Pittsburgh does a ton of that stuff, that's kind of their thing, but we've played them a lot the last few years, so we kind of know what to expect."Notes: Eric Berry remained out of practice Wednesday. The team had described his injury as a heel issue in training camp, but Reid clarified that it is Berry's Achilles tendon causing issues. The star safety tore his Achilles tendon last season. "Just being cautious with it," Reid said. "We have full trust in him. He's always very honest with us. We want him there for the long haul. We're trying to make sure everything is right there." ... LB Ben Niemann (hamstring) also did not practice Wednesday. ENGLEWOOD, Colo. (AP) — Case Keenum is on the move again. The Denver Broncos have agreed to trade the veteran quarterback to the Washington Redskins, a person with knowledge of the deal told The Associated Press on Thursday.The teams will also swap 2020 draft picks, with Denver receiving a sixth-rounder and Washington a seventh-rounder, said the person, who spoke on condition of anonymity because the deal cannot be announced until next week.Keenum’s contract will be reworked with the Broncos and Redskins each picking up half of the $7 million he was guaranteed in 2019.The Broncos decided to move on from Keenum last month when they agreed to acquire Super Bowl-winning veteran Joe Flacco from the Baltimore Ravens. Like the Keenum trade, the Flacco trade cannot become official until the start of the league year .March 13.For the second consecutive offseason, the Redskins opted to trade for a quarterback. Keenum enters the equation to try to replace 2018 addition Alex Smith , who broke his right tibia and fibula in November and is expected to miss the entire 2019 season.Keenum will likely compete with longtime Redskins backup Colt McCoy to be their Week 1 starter. The 31-year-old joins his fifth NFL team after stints with the Texans, Rams, Vikings and Broncos.A year ago, Keenum was coming off a career year in Minnesota Jordan Reed Jersey , where he went 11-3 and led the Vikings to the NFC championship game. That made him a hot commodity in free agency, second only to Kirk Cousins among available quarterbacks.After the Vikings signed Cousins, Keenum signed a two-year, $36 million deal with Denver that included $25 million in guarantees.Broncos general manager John Elway hoped he’d finally found a worthy successor to Peyton Manning after failures by Mark Sanchez, Trevor Siemian, Brock Osweiler and Paxton Lynch. But Keenum also found it difficult to thrive in the quarterback-crazed city where both Elway and Manning continue to cast long shadows.The Broncos went 6-10 last season, leading Elway to fire coach Vance Joseph and hire Vic Fangio. After his career year in Minneapolis, Keenum threw for 18 touchdowns and a career-high 15 interceptions in 2018.Elway said at the NFL combine that he’d prefer for Keenum to rework his deal and stay in Denver as the backup, but he left it up to Keenum, saying he’d honor a release request or would try to trade him if a suitable partner emerged.Keenum got off to a slow start last year, throwing interceptions in Denver’s first eight games. Preaching patience became a weekly mantra of his with Keenum expressing confidence he and his new teammates and coaches would eventually adjust to each other in time to make a late-season run.By December the Broncos weren’t rolling but staggering, bedeviled by an injury epidemic that had waylaid three O-line starters and the team’s top two tight ends. On Dec. 5, Emmanuel Sanders, who rose to No. 1 receiving threat when Demaryius Thomas was traded to Houston, tore an Achilles at practice.The Broncos lost their final four games, finishing 6-10 for their first back-to-back losing seasons since the Nixon Administration. That led Elway to fire Vance Joseph and replace him with Vic Fangio. Keenum wasn’t among the players who attended Fangio’s introductory news conference because he was on vacation out of the country.As he cleaned out his locker after the final game, Keenum said, “I learned a lot this year. I learned what it is to be a franchise quarterback.”But Elway would soon move on to his fifth starting QB since Manning retired a month after winning the Super Bowl three years ago.Even before the deal with Washington came together, Keenum seemed to indicate he would be moving on, telling the Sports Spectrum Podcast, “My time with the Broncos has been really special. I have enjoyed every second of it. I have absolutely been so proud to wake up every day and to walk into that building to represent the Broncos as their quarterback. … It was an honor.”