The loss of Kwon Alexander to the San Francisco 49ers defense stings. There is no replacing what he brought to the teams’ defense. Robert Saleh and the defensive staff have over a week to figure out how the Niners can move on from Alexander. There are likely three things that will happen, and one isn’t Elijah Lee, who will be promoted from San Francisco’s practice squad, assuming the team doesn’t sign a linebacker. Relying on a fifth-round or undrafted rookie may be the only option the team has at this point.