Pacheco is dealing with elbow tightness and won't throw for the next couple weeks, Jeff Jones of the Belleville News-Democrat reports.
Pacheco experienced the issue during a live batting practice session. While tests reportedly revealed nothing particularly concerning, he'll nonetheless back off from throwing for now. The 24-year-old right-hander reached Triple-A Memphis for the first time last season, posting a 2.27 ERA and 32.6 percent strikeout rate in 35.2 innings.