Pirates manager Derek Shelton confirmed Wednesday that Velasquez (elbow) will return to the rotation this weekend in Seattle, Justice delos Santos of MLB.com reports.

The safest bet is that Velasquez will slide into Luis Ortiz's spot Sunday, as Mitch Keller and Roansy Contreras are secure in their roles and currently line up to handle the first two games of the three-game series versus the Mariners. Out since May 5 due to right elbow inflammation, Velasquez tallied four strikeouts over 4.2 scoreless innings in his lone rehab start this past Saturday at Triple-A Indianapolis. He threw 63 pitches in that outing and should be able to handle 80-plus pitches in his return start with Pittsburgh.