49ers OTA practice roundup: Robinson, Purdy finding instant chemistry

SANTA CLARA — Demarcus Robinson has far more experience than any of the other healthy 49ers receivers.On Wednesday, Robinson was a standout on the practice field as a target who has meshed quickly with 49ers quarterback Brock Purdy."Demarcus has been awesome," Purdy said. "Just having that veteran receiver in that receiving room and showing those guys what it's like to be vet receiver."He's very smart. He's come in and learned the playbook. Not only that, he's gone out every single day and just competed. You can just tell he's a seasoned vet. He knows how certain routes are supposed to be ran, and just on top of everything and not messing up."Robinson took on a bigger role in practice with Jauan Jennings held out while he worked with the strength and conditioning staff. It was not immediately known why Jennings was held out of practice.The session got off to an uneven start for Robinson, who could not hold onto a Purdy pass with cornerback Deommodore Lenoir swooping in for the pass breakup.Robinson bounced back with a difficult 25-yard pass at the sideline against good coverage safety Jason Pinnock.He made another good reception against cornerback Tre Brown, then split the...