2. Keenan Allen, safety
This one actually makes a lot of sense and quite frankly I think it would only take one offseason of work and Keenan Allen could probably make a solid safety that would get legitimate reps somewhere in the league. This obviously will not happen as long as he is an elite receiver, but he does have some safety in his blood.
Allen played safety in high school and was actually recruited in college to be a safety. Allen was actually the no. 1 safety prospect in the nation and was originally committed to go to Alabama. However, he ultimately de-committed to Alabama and instead attended Cal as he wanted to be on offense more.
That was probably the right choice for Slayer, who has gone on to make quite the living in the NFL and is absolutely one of the 10 best (if not 5-6 best) receivers in the entire NFL.
It is still a fun thought experiment to imagine Allen as a safety in the NFL. The one worry would be his tackling ability but he certainly has great size at six-foot-two and is quick enough to hold his own at the position. We know he has fantastic hands and is such a great route runner that it should mirror into man and zone coverage.
He probably would not be a hard hitter in the slightest but as a ball-hawking safety maybe Allen could have been drafted and been a defensive player.
Allen does have one interception in his career as he is occasionally put on hail mary defense because of his size and hands. Allen’s interception was in 2017 against the New York Jets at the end of the first half.