The San Francisco 49ers opened their 2024 season with a 32-19 rout of the New York Jets.

A 13-point margin of victory doesn't properly highlight how thoroughly the 49ers dominated the game. It was the kind of performance that belied a rocky offseason that featured two All-Pros who missed the entire preseason and another All-Pro going down with calf and Achilles injuries. The 49ers looked very good, which isn't a surprise because of their overwhelming talent.

On the other hand, we learned a lot about the club in Week 1:

Offensive line is good

The 49ers' offensive line was a big-time question mark entering the year. They looked like they had an opportunity to improve this season, but they surpassed expectations in Week 1. San Francisco's OL paved the way for 181 rushing yards on 37 attempts. They also kept quarterback Brock Purdy clean, allowing just seven pressures according to Pro Football Focus. If the 49ers' offensive front is going to be as good all year as it was Monday, their offense is going to be extremely tough to stop.

Pass rush needs a lift

This was more confirmed than learned. San Francisco's defensive end depth was certainly a concern entering the season. It got worse when Yetur Gross-Matos went down with a knee sprain and missed the opener. The 49ers had only 11 pressures. Nine of them came from DEs Nick Bosa and Leonard Floyd. The other two came from defensive tackles Javon Hargrave and Jordan Elliott. Gross-Matos's return should help, but all signs are pointing to another mid-season trade for the 49ers to try and fix their edge situation.

Jordan Mason changes CMC's outlook

There are no further questions about Mason's ability to shoulder a substantial workload. Christian McCaffrey has taken a lion's share of the snaps and touches since he arrived midway through the 2022 season. After Mason's 28-carry, 147-yard outing, he should be able to take some of that work off of McCaffrey's plate. The reigning Offensive Player of the Year will continue being the offensive focal point, but McCaffrey's number of touches should be able to come down significantly now that the 49ers know Mason is capable of keeping the offense humming.

Secondary first

San Francisco's secondary was as-advertised. Save for one breakdown on a strange play where Leonard Floyd jumped offsides they were excellent. Jets QB Aaron Rodgers threw for 167 yards with one touchdown and one interception. Deommodore Lenoir's deflection led to an interception for linebacker Demetrius Flannigan-Fowles. Charvarius Ward nearly had an interception as well, and Isaac Yiadom came up with a pass breakup on a fourth-and-1 throw. With the 49ers' pass rush a question mark, their secondary has to be as good all year as it was against the Jets.

Brock Purdy is that dude

It wasn't Purdy's best game as a pro. He went 19-of-29 for 231 yards. However, he showed great command of the 49ers' offense, avoided negative plays, made a handful of excellent throws, and overall put his club in position to win while their run game dominated. There'll be better statistical games for Purdy, but any lingering questions about his status as a franchise quarterback are rapidly dwindling.

Run defense improves

Run defense was a problem for the 49ers late last season. Then they lost Arik Armstead in the offseason. Newly-signed defensive tackles Maliek Collins and Jordan Elliott were very good against the run. Javon Hargrave also had a couple of run stops. They also helped keep linebackers Fred Warner, De'Vondre Campbell and Demetrius Flannigan-Fowles clean. San Francisco held the Jets to just 68 rushing yards on 19 carries. They've allowed 68 or fewer rushing yards only one other time since Week 14 of last season. They'd allowed 100-plus rushing yards in six of their last seven games dating back to last year's playoffs and regular season.

This article originally appeared on Niners Wire: What we learned about 49ers in Week 1 win over Jets