Before the start of the second round of the NFL draft last year, the 49ers traded their 2015 fourth-round pick to the Bills for wide receiver Stevie Johnson.
A year later, however, the 49ers have restocked: They will enter the second round of the draft Friday with three fourth-round selections.
One of those picks, of course, came in a trade with the Chargers on Thursday night. The 49ers moved back two spots to No. 17 in exchange for a fourth rounder and a 2016 fifth-round pick. They also picked up a fourth-round pick in a draft-day trade with the Broncos last year and have a compensatory selection.