5. Kyle Schwarber
The Kyle Schwarber experiment hitting leadoff was generally not successful, and kind of a head-scratcher. In addition to being a home run hitter and RBI machine, which typically hit in the middle of the order, Schwarber is a slow baserunner. He just does not fit the profile of a leadoff man and got on base at a .307 pace in 2017 and 2019 combined which is nothing special. He did crank 24 homers in the 1 hole during that time, but he hits home runs wherever he is in the lineup.
Even though he has hit leadoff in Philadelphia quite successfully, with Trea Turner now on the Phillies, I would be pretty astonished if they keep the big man there, even though 38 of his home runs came from hitting first last year.