The San Francisco 49ers signed 2020 first-round draft picks Javon Kinlaw and Brandon Aiyuk to their rookie contracts, the organization announced Friday.The 49ers selected Kinlaw, a defensive tackle out of South Carolina, with the 14th overall pick. The club choose Aiyuk, a wide receiver out of Arizona State, 11 picks later after moving up six spots in a trade with the Minnesota Vikings.Kinlaw, 22, registered 35 tackles, 6.0 sacks and two fumble recoveries last season with the Gamecocks. He collected 93 tackles, 10.5 sacks, three forced fumbles and four fumble recoveries in 37 games (34 starts) over three seasons at South Carolina.Aiyuk recorded 65 receptions for 1,192 yards and eight touchdowns during his final season with the Sun Devils. The speedster also averaged 31.9 yards on kickoff returns and 16.1 with a touchdown on punt returns.Sixth-round tight end Charlie Woerner is the lone member of the team’s 2020 draft class that has yet to sign his rookie contract.