Swanson is having a terrible sophomore season. Over 378 PAs he has produced an OPS+ of 58, meaning 58% of league average.
How likely is a 22/23 year old to rebound and have a nice career after such a bad stretch?
Here is a list For single seasons, From 1997 to 2017, Age between 22-23, From 1st season to 2nd season, For any choice in Season Totals, (requiring PA >= 350 and onbase_plus_slugging_vs_split <= 60), along with each player's career WAR and peak season WAR:
Brandon Phillips (31.4, 4.7)
Ronny Cedeno (negative)
Jack Wilson (23.5, 4.8)
Mike Caruso (0.8, 2.7)
Ramon Santiago (7.9, 2.7)
Cesar Izturis (6.3, 3.8)
Perhaps unsurprisingly, all of those players were SSs, except BP who was a terrific defender at 2B.
Swanson is young enough that there is some time for him to rebound and be a Phillips/Wilson level player. Of course, there is a significant chance he ends up being more similar to the other 4 guys.
He still has the floor of a contributor like Izturis or Santiago, but let's hope he ends up being the next Jack Wilson or Brandon Phillips instead.