Nelson (groin) has shown improvement but won't throw off the mound for multiple days, Ken Gurnick of MLB.com reports.
In addition to groin soreness, Nelson is also suffering from a tight back. The 30-year-old has pitched only 22 innings since the end of the 2017 campaign and is not a lock to make the Dodgers' Opening Day roster. If he does earn a spot on the squad, Nelson could be used as a starter or as a "Brandon Morrow-type reliever," per Gurnick.