49ers

49ers sign undrafted rookie defensive back Alex Brown, waive Damontre Moore

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AP

49ers sign undrafted rookie defensive back Alex Brown, waive Damontre Moore

The 49ers on Thursday signed an undrafted rookie defensive back and waived a standout defensive lineman from the now-defunct Alliance of American Football.

The 49ers announced the signing of cornerback Alex Brown to a three-year contract. Brown, an undrafted rookie from South Carolina State, attended the team’s rookie minicamp two weeks ago.

The 49ers waived defensive lineman Damontre Moore to make room for Brown on the 90-man roster. Moore played for the San Diego Fleet of the AAF. He recorded 22 tackles, seven sacks and a fumble recovery this spring in the short-lived professional league.

[RELATED: Jason Verrett nearly retired after tearing Achilles]

Brown (5-foot-11, 170 pounds) was a second-team All-Mid-Eastern Athletic Conference selection as a senior. He appeared in 31 games with 25 starts during his career. He recorded 90 tackles, 26 passes defensed, seven interceptions and one sack.

Watch 49ers coach Kyle Shanahan recite his longest play from memory

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USATSI

Watch 49ers coach Kyle Shanahan recite his longest play from memory

If you're like me, you can't remember anything. This is the part where I say, "I can barely remember what I had for breakfast," but you caught me on a good day.

Toast with butter and strawberry jelly, and scrambled eggs -- with ketchup, because I'm weird. 

So when it comes to remembering an entire football play  ... well, that's why some of us play the sport -- and others just watch it.

Listen to 49ers head coach Kyle Shanahan recite his longest play:

Quarterback Jimmy Garoppolo has to memorize these types of plays, which is insane. Then has to relay the information to the huddle -- yeah I know, you know football. I'm just trying to remind you of the steps. But at least Jimmy G gets to repeat the play at least one additional time, right?

That should be enough. 

[RELATED: David Carr doesn't rank Montana as top-10 Super Bowl-era QB]

I asked five-year veteran quarterback Sean Salisbury about the longest play he had to memorize in his NFL career.

"Explode to double right, Zoom, Scat right 585 Dodge, X Post check with me 60 outside. Double cadence on 2," Salisbury told NBC Sports Bay Area. "That’s one."

So Shanahan isn't the only "wizard" in this scenario -- or any of the scenarios. 

Chip Kelly 'not surprised' ex-49ers assistant prevented school shooting

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USATSI

Chip Kelly 'not surprised' ex-49ers assistant prevented school shooting

Chip Kelly knows the type of person Keanon Lowe is. It's why Kelly recruited Lowe as a football player at the University of Oregon, and years later had him on his staffs with the Eagles and 49ers as an assistant.

When Lowe prevented a school shooting Friday at Parkrose High in Portland, Ore., Kelly wasn't surprised at all. In fact, what the now-UCLA coach wanted to know was Lowe's form in going from a former receiver to a defensive player in a heroic act.

“I wanted to know his [tackling] technique,” Kelly said Saturday to Scott Osler of the San Francisco Chronicle. “He told me it was like when he was on kickoff coverage, it really didn’t matter how you tackled 'em as long as you got 'em to the ground.”

Lowe now is the head football coach and security guard at Parkrose. The school was on a 23-game losing streak when he arrived, and Kelly isn't surprised Lowe would step into a situation so far from the NFL.

"He’s just a special person that’s always wanting to help and serve," Kelly said. "He’s the type of kid you just want to be around him. He’s a special young man, and I think everybody is fortunate he was where he was yesterday afternoon.”

[RELATED: Kerr lauds ex-49ers assistant for preventing school shooting]

Lowe played two seasons under Kelly at Oregon. He made 18 tackles on special teams between his freshman and sophomore years.