The Yankees placed Loaisiga on the 15-day injured list Sunday due to right mid-back tightness.
The injury presumably surfaced during Loaisiga's appearance against Miami on Friday, when he allowed one hit and plunked a batter while recording just one out. The right-hander will be eligible to be reinstated in mid-August, though a timeline for his return likely won't be established until he meets with the Yankees' team physician back in New York, according to Bryan Hoch of MLB.com.