In the third round (No. 95 overall) of last week's draft, the 49ers selected Tarvarius Moore.
He played safety at Southern Miss, but the 49ers are expected to play him at cornerback.
"I really, really like (him) and I watched him late in the process because I was told about him," Greg Cosell said on KNBR 680 on Monday. "This kid is an explosive athlete. He ran a 4.32 and his vertical jump is over 38 inches.
"I thought he was one of the better safety prospects in the draft class. I'm sure playing at Southern Miss hurt his draft stock."
If all goes according to plan, Akhello Witherspoon and Richard Sherman will be the starting cornerbacks on the outside.
Jimmie Ward -- who can play practically everywhere in the secondary -- will open the offseason program at corner while Sherman recovers from two surgeries.
At safety, the 49ers have Jaquiski Tartt (who signed a two-year extension last week) and Adrian Colbert.
There's also nickel back K'Wuan Williams, and incoming rookie D.J. Reed (a fifth round pick).
So there is plenty of competition for Moore.
As Matt Maiocco wrote:
Moore should be an immediate impact player on special teams while the team tries to find his niche on defense. The 49ers are going to play him at cornerback. If he has a difficult time in that new spot, his ability to play center field could place him into the competition to start at free safety. At worst, he should suit up as a backup.
"This kid's a premium athlete. He has basically unmatched size, speed, explosiveness as a profile," Cosell added. "I really liked him. Now, that doesn't mean he's gonna come in and be an All-Pro in his rookie season. but I think this kid is a fascinating prospect."