The 49ers trade twice, acquire a pair of RBs who are a perfect fit for Kyle Shanahan

Kapri Bibbs just has that feel of a running back who can succeed in a Shanahan system

The 49ers continued making eyebrow-raising moves during the 2017 NFL Draft on third day of action, acquiring a running back who could be an interesting guy to watch moving forward in Kyle Shanahan's offense.

After spending the first day dominating and grabbing two of the top three players on their board, the 49ers circled back and grabbed cornerback Ahkello Witherspoon (B+ from Pete Prisco) and then a developmental quarterback in C.J. Beathard out of Iowa. 

The 49ers spent their third day acquiring a player via trade, giving up a 2018 fourth-round pick to the Broncos for running back Kapri Bibbs and a fifth-round pick in this draft, No. 177 overall.

Bibbs will be the first "pick" of the day for the 49ers, who aren't holding an early fourth-round pick after giving up No. 109 overall to the Vikings to acquire the No. 104 overall pick at the end of the third round. 

But the 49ers weren't done in the fourth round, moving up in another trade to grab another running back. San Francisco gave up No. 143 and No. 161 overall to the Colts for No. 121 overall, which they used to select Joe Williams out of Utah.

And with that, Carlos Hyde may have been put on notice. Or maybe he'll just be a part of a larger plan they're utilizing for the running back position that involves attacking the position in a very Kyle Shanahan kind of way. In fact, it's a whole Shana-clan kind of way.

Kyle's dad Mike made a living getting mid-round running backs to produce like early-round guys. Terrell Davis and Clinton Portis are the most famous ones, but don't forget when he got massive seasons out of guys like Mike Anderson, Reuben Droughns and Tatum Bell. Selvin Young and Peyton Hillis (who would go on to rush for 1,000 yards in Cleveland) also had success. 

The younger Shanahan has found success too. Hello, Steve Slaton, Terrence West, Alfred Morris and Tevin Coleman.

Bibbs only had 29 carries last year, but is explosive and might fit that one-cut style pretty well. Same with Joe Williams, who also brings some character concerns with him after being booted from UConn and then taking some time away from football while in Utah. 

Neither guy is a guaranteed workhorse by any means. But they're both low-risk options in the running game who add value in different ways for Shanahan's offense, which is being rebuilt in San Francisco.