"Delanie had more speed than I thought he did on that long run," Whisenhunt told ESPN.com.
Walker caught 10 balls for 142 yards in the loss. It was the first 100-yard game of his career.
"There were a lot of factors that were involved," Whisenhunt told The Tennessean. "The quarterback gets the credit a lot of times, and he gets the blame a lot of times. There were some protection issues in the first half that led to some problems. ... It was a team effort."
Locker, who finished with 234 passing yards, one touchdown and two interceptions, visits the Bengals in Week 3.