The other was Mahomes' most impressive play of the day. Chargers nose tackle Brandon Mebane shot through the A-gap at the snap, and with a 311-pound defensive lineman basically running free in his face, Mahomes didn't panic and try to scramble out of the pocket. Instead, he stayed tall and fired an absolute strike to Hill. The pass came out so quick that Jahleel Addae wasn't able to gain any sort of angle of attack on Hill, who ran right by a diving tackle attempt and sprinted upfield for a 58-yard touchdown.

That's the thing about these Chiefs. There are going to be moments in which they simply beat you with athleticism no other team in the league can match, plays in which Mahomes throws the ball as hard as anybody in the world and Hill outruns athletes who have never been outrun in their life. There was a 21-yard touch pass to start the second half where Ingram identifies Hill coming across the formation and just makes a desperate, cartoonish lunge to try to take him down. Hill is already out of the way by the time Ingram leaves his feet. Ingram is 264 pounds and had elite agility markers coming out of college. What happens when the Chiefs play a bad defense?

The league will start looking at some of the Chiefs' motion packages on tape as the season goes on, and they'll adjust, as was the case in 2017. Offenses will steal their stuff and defenses will get a sense of how to stop it. There might even be a midseason lull similar to the one we saw last season, when the Chiefs' offense went on vacation for most of November during a four-game losing streak.

The difference, though, is that the Chiefs have another gear they couldn't get to last season. This was the Hill Show, but we know Hill isn't the only guy. Reid lined up Travis Kelce as the lone man on one side of the field and went with trips and diamond formations on the opposite side, as he has done in years past, but Mahomes rarely looked Kelce's way. The tight end had only one catch on six targets, although he dropped a curl route. Wideout Sammy Watkins, who's making $16 million a year and had a quiet preseason, only caught three passes for 21 yards on five targets. Hunt had 49 yards from scrimmage. There will be days in which Hill isn't as spectacular as he was on Sunday. When that happens, no team has more weapons waiting in reserve than the Chiefs. And when the league figures out the Chiefs' motions and misdirections, Mahomes might be good enough to beat teams with whatever Reid is holding back.

If the Steelers wanted to show Le'Veon Bell what he was missing, Conner might have served as the Ghost of Christmas Future on Sunday. With Ben Roethlisberger struggling in a rainy, windy mess of a Cleveland afternoon, the Steelers turned things over to their second-year back, who absorbed a mammoth workload. Conner finished the 21-21 tie with 36 touches, which would have been the sixth-largest total in any game for a player last season. Two of the five games with 37 touches or more belonged to Bell. When Conner scored the first of his two touchdowns on a 4-yard plunge, it was telling that the Steelers' offensive linemen celebrated as if it was their first NFL touchdown, too.

It would absolutely be fair to say that Conner got a ton of help from his offensive line, which helped clear out big enough holes for Conner to seemingly go untouched on both of his touchdown runs. Eighty-seven of his 135 rushing yards came before first contact. Conner doesn't have the unique patience of Bell to wait around behind the line of scrimmage for his hole to open, but the 23-year-old had the vision to adjust his runs and consistently make the right cut upfield while extending those runs by breaking ankle tackles.

On the other hand, Conner's efficiency went down as the Steelers tried to take the air out of the ball late and the Browns keyed on the run. Eight of his first 11 carries improved Pittsburgh's expected point totals for the drive in question, but just three of his final 20 rushes built expected points for the Steelers. The former Pitt star also cost the Steelers dearly by fumbling the ball away deep in his own territory to the Browns, who scored a touchdown to get within seven on the next play.

The most exciting thing about Conner's afternoon to me, though, was that he was functional as a receiver. He hasn't been a useful receiver at the college or pro level; he ran the ball 668 times at Pitt but caught just 30 passes, including 21 during his senior season. Conner failed to catch his lone target last season, but like Bell, he lost weight after his first NFL season and came back as a leaner, more explosive back. On Sunday, the Steelers were able to throw to him out of the backfield for five catches and 57 yards on six targets. Three of the catches went for first downs, while a fourth gained valuable yards to set up what should have been a game-winning field goal in overtime, only for Chris Boswell to miss from 42 yards out.

Before Sunday, the idea that the Steelers could replace Bell with Conner just didn't add up. Conner is never going to be a like-for-like replacement and probably won't be as special of a back as Bell has become, but the Steelers just can't replace Bell with a back who isn't a factor in the passing game. The Steelers don't need to be able to split Conner out against cornerbacks and have him win one-on-one, but if he couldn't scare teams as a receiver, Conner would have topped out as part of a rotation. Sunday showed that Conner is good enough to hurt teams that want to drop their linebackers deep into coverage or who forget about him if he starts as a blocker and leaks out into the flat as a receiver. The guy we saw on the field Sunday could replace Bell in 2019.

What happens this season, though? So much depends on Bell, who tweeted out a curious emoji after the game yesterday. It still seems likely that Bell returns at some point, but if Conner continues to play this well, there's no way the Steelers can just hand Bell 30-plus touches per week and park Conner on the bench. Some sort of rotation would make the most sense, given that it would allow Conner to continue his on-field education while resting Bell, who clearly wants to stay healthy in advance of a big deal from some other team in free agency this offseason.

The Steelers had six turnovers in the tie against the Browns, including one Conner fumble. Jason Miller/Getty Images

Bell hasn't really split time with another back since 2014, when the Steelers signed LeGarrette Blount and used him in a rotation with the still-emerging Bell. (DeAngelo Williams was really either a starter when Bell was unavailable or sat on the bench when Bell was active.) Blount averaged 6.5 carries per game before being released and making his way back to the Patriots. It would make sense to see the Steelers give Conner a similar sort of workload while adding a target or two per game.

In the long term, Conner's success in Week 1 should remind Steelers fans that there will be life if Bell does leave in free agency. The Steelers have one of the best offensive lines in the league, arguably the best wide receiving corps in the league, and a Hall of Fame quarterback. They've managed to find a replacement for Barry Foster by making a draft-day trade to acquire Jerome Bettis after a down season. They found a partner for Bettis by signing Willie Parker as an undrafted free agent. When first-round pick Rashard Mendenhall failed to live up to expectations, the Steelers found another franchise back in Bell with the 48th pick of the 2013 draft. They're good at this. Sunday was the first sign that they might have found their next great running back.

Baltimore's wideouts

For one day, at least, the trio of additions Ozzie Newsome made to his long-suffering wide receiving corps clicked with Joe Flacco. The Ravens moved on from Jeremy Maclin, Mike Wallace and former first-round pick Breshad Perriman and replaced them with free agents John Brown, Michael Crabtree and Willie Snead. The only wideout left on the roster who caught a pass last season is backup Chris Moore.

The results couldn't be better through Week 1. Flacco threw 11 passes to his wideouts on Sunday and completed all 11, generating 136 yards and three touchdowns in the process. The result was a 157.8 passer rating on throws to those wide receivers, which is the best passer rating Flacco has ever posted on throws to his wide receivers in a single game. If you look at Flacco's 10 previous best games on throws to his wideouts (with a 10-attempt minimum), just one of the previous 15 have come since the end of the 2014 campaign.

While the simple story about this Ravens season after the draft seemed to revolve around the inevitable swap of Flacco for first-round pick Lamar Jackson, what we've seen so far suggests that the Ravens aren't in a rush. Jackson struggled some during the preseason, although he improved as the month of August went along. On Sunday, Jackson was an ancillary figure, running seven times for 39 yards while completing one of his four pass attempts for 24 yards, most of which came late in the blowout. The Bills made this easy for Flacco and impossible for their defense -- the average Ravens drive began on their own 41-yard line -- but if the Super Bowl MVP plays like this, the Ravens won't be in a rush to make any change.

Nathan Peterman was benched again in Week 1, this time after completing only 5 of 18 passes and throwing two picks. Tommy Gilligan/USA TODAY Sports

It's hard to have sympathy for the Bills, who did this to themselves in scapegoating Tyrod Taylor for their offensive problems over the past year. It's far easier to feel for Peterman, who is simply overmatched at the NFL level and is being used as a sacrificial lamb. By going 5-of-18 passing for 24 yards with two interceptions, Peterman became the 36th quarterback since the merger to post a passer rating of 0.0 in a game with 15 or more attempts and just the second since 2008. The bright side might be that the last passer to do it was Peyton Manning, on the day he was benched for Brock Osweiler and during the season in which he won a Super Bowl.

Unsurprisingly, Peterman is off to the worst start of any young quarterback in recent memory. He has been unable to finish each of his first three starts, as he was benched against the Chargers in the five-interception games last season and then again against the Ravens on Sunday (he was injured after starting against the Colts last season). Going back through 2001, Peterman's 16.8 passer rating across his first three starts is the worst for any passer, comfortably behind Alex Smith (29.4) and Brooks Bollinger (37.0). The best passer rating for any passer through three starts over that time frame, ironically, belongs to Taylor.

The Bills took out Peterman for rookie first-rounder Josh Allen, who went 6-of-15 passing for 74 yards without any interceptions in his professional debut. Buffalo didn't commit to a starter after the game, with coach Sean McDermott suggesting he needed to watch the tape before making a decision on Peterman, which honestly might be more about penance than study. Peterman's five completions on Sunday traveled an average of minus-0.4 yards in the air. While Allen isn't a finished product, he's better than Peterman right now and obviously will be starting by the end of the season.

It's pretty clear, though, that the Bills aren't especially desperate to insert Allen into the lineup given their early-season slate. They faced the Ravens, who led the league in pass defense DVOA last season, in the opener. Buffalo gets the Chargers and their ninth-ranked pass defense next week, and they already know what Los Angeles' defense can do to an overmatched quarterback making his first start. They travel to Minnesota to play the Vikings in Week 3. Would you want to put Allen in for his NFL debut against any of those defenses with one of the league's worst offensive lines protecting your future franchise quarterback? The Bills probably hoped to get by with Peterman against that brutal early slate before turning things over to Allen. Peterman might not be good enough to afford them even that modest luxury.