The San Francisco 49ers topped the Kansas City Chiefs 27-17 in Week 1 of the preseason. A second-half comeback was led by rookie quarterback C.J. Beathard. Here are the takeaways from Friday night.1. Rashard Robinson had a night of big ups and big downs in his two drives of action. He surrendered a 32-yard completion to Tyreek Hill on the first play from scrimmage. He then missed a tackle on third down that would have held the Chiefs to a field goal. Instead, Kansas City was able to find the end zone on the game's opening possession. On the second drive, Robinson got beat again by Chris Conley for a 29-yard gain.

Then Robinson got his redemption. A run stop in the backfield was followed by the 49ers first takeaway of the game. Robinson intercepted a pass and returned it 30 yards to give the 49ers great field position. The pick allowed the second-year corner to end on a positive note on a night that will provide him with plenty of quality tape to go back and review.

**

2.** Reuben Foster started at linebacker next to NaVorro Bowman. He played for most of the first half and had two tackles. Foster nearly provided an early highlight as a would-be interception bounced in and out of his hands. The linebacker was in coverage in the end zone and jumped the route.

3. Lorenzo Jerome, not Vinnie Sunseri, got the start at free safety in place of the injured Jimmie Ward. The undrafted rookie posted three tackles.

4. Aaron Lynch had himself a day and was possibly the 49ers MVP. He had a run stop, a pass breakup at the line of scrimmage and two sacks. It's been well documented that Lynch is in shape and has been impressive during practice. That strong play has now carried into the preseason.

5. First impressions of Solomon Thomas are exceedingly positive. The third-overall pick was disruptive throughout. On one drive in the second half, the Chiefs tried twice to convert in short-yardage situations and on both plays, Thomas burst into the backfield to help get the stop. He was credited with two official tackles and had multiple quarterback pressures. Thomas played into the fourth quarter.

**

6.** San Francisco's first-team offense struggled in two series of work and failed to get a first down. Hoyer finished 1-of-4 passing for just three yards. He did have a 15-yard completion on third down to Jeremy Kerley that was called back due to penalty.

7. Matt Barkley checked in after Hoyer and threw for 168 yards on 10-of-17 passing. His longest completion was a 63-yard gain to Aldrick Robinson. Robinson made an impressive move after the catch to break free and then took off down the left sideline. The two later connected in the end zone, but the touchdown was called back due to penalty.

8. Speaking of flags, the 49ers had 17 penalties for 131 yards on Friday. As mentioned above, a few of those infractions cost the 49ers a big play. That's often the case in the preseason, but it will still be a point of emphasis going forward.

9. As expected, Joe Williams and Matt Breida were the focal point of the 49ers rushing attack. Breida got in first, but the two rotated back-and-forth throughout the game. Williams finished with seven carries for 60 yards and Breida carried 11 times for 40 yards. Raheem Mostert proved that the 49ers have plenty of depth at running back. He helped drain the clock in the fourth quarter and finished with 89 yards on 15 carries. Pierre Garçon didn't gain a yard on two carries and Tim Hightower did not play.

**

10.** After a slow start, Beathard settled in nicely. The 49ers first touchdown came from Beathard to Kendrick Bourne. The rookie quarterback avoided pressure, stepped up in the pocket and fired a strike downfield to Bourne for a 46-yard touchdown. He later completed a two-yard touchdown pass to Tyler McCloskey. Beathard had a few misfires early and was sacked twice, but ended up with a very nice preseason debut. His night ended with 101 passing yards and two touchdowns on 7-of-11 passing.

11. Bourne finished as the 49ers leading receiver with four receptions for 88 yards.

12. San Francisco's offensive line struggled at times and allowed three total sacks.

13. Austin Calitro forced the 49ers second turnover of the game when he knocked the ball loose, and D.J. Jones recovered the loose ball.

Odds and Ends:

• Trent Taylor caught all three of his targets for 33 yards. He also added a 33-yard punt return at the end of the game. He's going to be a fun player to watch, even as a rookie.

• Garett Celek had a 24-yard reception.

• Robbie Gould was 2-for-3 on field-goal attempts. He was good from 38 yards twice and missed from 50 yards. His second make iced the game and put the 49ers up two scores. Nick Rose made both of his attempts from 22 and 27 yards.

The 49ers will now turn their focus to the Denver Broncos. San Francisco will host Denver for two practices next week before the clubs meet in Week 2 of the preseason.