San Francisco 49ers' Vernon Davis (85), center, and teammates listen to a coach during NFL football practice, Thursday, May 21, 2015, in Santa Clara, Calif.
San Francisco 49ers' Vernon Davis (85), center, and teammates listen to a coach during NFL football practice, Thursday, May 21, 2015, in Santa Clara, Calif. George Nikitin AP
San Francisco 49ers' Vernon Davis (85), center, and teammates listen to a coach during NFL football practice, Thursday, May 21, 2015, in Santa Clara, Calif. George Nikitin AP