Zuerlein has one of the stronger legs in football and has the confidence of coach Jeff Fisher to attempt field goals of all distances. He already has eight made field goals of 50 yards or more in his first two years and while he's struggled during preseason, the Rams aren't too concerned. He's one of the better young kickers in the game.
Through two preseason games Zuerlein is just 1-for-4 in field goal attempts, which includes a miss of 34 yards out. Of course, he's also 4-for-4 in extra point tries, which are 33 yards because of the NFL's experiment with harder PAT attempts. The Rams' offense has also proven to be inconsistent under OC Brian Schottenheimer, which could limit Zuerlein's potential.
There's not much downside to Zuerlein; he just isn't a top 12 kicker at this point in his career. We currently rank him 18th among kickers so while he could be a nice waiver wire pickup at some point during the season, better options will be available during your draft.