The Chargers don’t have an outsized need at receiver, but it can never hurt to do some due diligence on a potential first-round pick at a premium position. The 49ers, on the other hand, still need more firepower at wideout. Brandon Aiyuk’s release is just a matter of paperwork and Jauan Jennings remains a free agent. Even after signing Mike Evans, San Francisco is in the mix to add a receiver in the back half of the first round. Concepcion is electric with the ball in his hands, making him a great complement to Mike Evans’ jump-ball skill set.