Scout: Johnson elite No. 3 receiver

SANTA CLARA, Calif. -- On Friday we looked at the early impact new veteran receiver Steve Johnson had on the first day of the San Francisco 49ers' training camp.

It got me wondering. Where will Johnson rank among the No. 3 receivers in the NFL? After all, he was a top option for the Buffalo Bills before his trade to the 49ers. I enlisted ESPN scout Matt Williamson for some help. Williamson is high on Johnson.

"I would say he is one of the very best 3rd receivers in the NFL," Williamson said. "He has a proven track record. [At 28], he's still more or less in his prime. He doesn't have anything close to elite talents, but gets the most out of what he has."

Williamson thinks the 49ers' three top receivers -- Michael Crabtree, Anquan Boldin and Johnson -- is a top-10 group. It could be much higher because tight end Vernon Davis is such a receiving weapon.