Wide receiver Trent Taylor has not been participating in practices since the San Francisco 49ers kicked off organized team activities three weeks ago. The 49ers kicked off a three-day mandatory minicamp on Tuesday, and the second-year player is still unavailable.

Taylor has been dealing with a back injury, which head coach Kyle Shanahan described as "wear and tear" from the receiver's rookie season.

"He had some back issues that were bothering him this offseason," Shanahan said on Tuesday. "We were patient with it. It was still bothering him right before OTAs, so we went in and cleaned some things up. He'll be good to go by training camp."

Shanahan didn't seem too concerned about Taylor's recovery time following the surgery. The team wanted to make sure the receiver was ready for the start of training camp.

"When you say back surgery, it seems like a huge deal," Shanahan continued. "It was more of a minor thing that I think (Garrett) Celek had a few years ago on something similar. Something we feel very good about. It's just going to take a little time to heal, but he should be good if not right away in camp, at least a week or two (in)."

The 49ers made Taylor a fifth-round draft pick out of Louisiana Tech last year. During his rookie season, he registered 43 receptions for 430 yards with two touchdowns.