"An undrafted free agent in 2017, Mabin saw 29 snaps on the field on Sunday (against the Los Angeles Chargers) and was targeted five times," wrote Gordon McGuinness. "From those five targets, he allowed just two receptions for 18 yards and a passer rating of just 50.4. Mabin also finished the day with three tackles, with two of those resulting in a defensive stop."
Count three-time first-team All-Pro cornerback and teammate Richard Sherman among those who were impressed with Mabin.
"I think for a guy to come in and get a tackle and a forced fumble in his first two reps, I'd consider it a very fruitful day for him," Sherman told reporters before Thursday's practice. "I think that he came out there and executed. He played hard. He brought energy, intensity. We were happy about it.
"The coaches have been talking about him for weeks because he's had amazing days in practice. He's been incredible, locked in, and executing. So it was good to see him get his opportunity."
In addition to the forced fumble mentioned by Sherman, Mabin finished Sunday's game with four combined tackles.
"Greg Mabin, over the last few weeks, has been doing an excellent job with his practice habits," defensive coordinator Robert Saleh said on Thursday. "He earned the right to at least be part of the rotation with playing time."
What did Saleh see out of Mabin during Sunday's game?
"Great intent, everything he showed in practice," Saleh answered. "Great physicality, competitive toughness, communication skills. He did play very well in the game. He gave up one, but it was well-contested."
Saleh wouldn't hint at who might start at cornerback on Sunday against the Arizona Cardinals. Sherman is trying to work his way back onto the field after suffering a calf injury on September 23. Should he be able to go, it might be a battle between Mabin and fellow second-year cornerback Ahkello Witherspoon for playing time opposite the veteran. Defensive back Jimmie Ward is also in the mix.
"I'm really looking for one of them to grab hold of it and just have a stranglehold on it and not let it go," Saleh said. "When you get your opportunities in this league, never leave doubt."
Head coach Kyle Shanahan was also pleased with Mabin's performance against the Chargers.
"I was happy with how he did," Shanahan said on Monday. "He came in, made two big plays on his first two plays in. His first two plays were right after the interception that they returned, the one that we had in our red zone and they returned it [...] Mabin's first play in he had a tackle for about a one-yard gain. His second play in, he caused a fumble. Then the third play, we got off the field on third down.
"I was really happy with how he played, and that's why he got some time. That's how he's looked in practice, and he carried it over to the game."
More San Francisco 49ers News
-
49ers' Keenan Allen impressed with Brock Purdy, Kyle Shanahan, addresses Mike Evans beef
Wide receiver Keenan Allen will participate in his first practice with the San Francisco 49ers on Wednesday, giving him his first opportunity to catch passes from quarterback Brock Purdy as he begins learning head coach Kyle Shanahan's offense. Allen was asked what he's... -
49ers officially announce Keenan Allen trade, re-sign cornerback
The San Francisco 49ers have officially announced their trade to acquire wide receiver Keenan Allen from the Indianapolis Colts in exchange for a 2027 sixth-round draft pick. The move to bolster San Francisco's wide receiver depth was first reported Tuesday ahead of the NFL... -
Kyle Shanahan identifies what DeForest Buckner can bring to the 49ers' young defensive line
The San Francisco 49ers didn't bring DeForest Buckner back just to add another talented defensive lineman to their roster. They also brought back a player who understands what it takes to succeed in Kyle Shanahan's system and has the experience to help develop some of the... -
Should the 49ers stand pat at the trade deadline to develop young talent?
The NFL trade deadline won't pass until 1:00 p.m. PT tomorrow. Hopefully, it passes without the 49ers making any moves. Plenty of fans and evaluators have been clamoring for a new receiver or edge rusher. An interior defensive lineman was a desire, and 49ers general manager...