“Adam is a proven, versatile and well-rounded player,” Seattle general manager Jerry Dipoto said in a statement. “His presence makes our lineup longer and our team more complete.”
The Padres acquired left-handed reliever Ray Kerr and outfielder Corey Rosier.
Kerr was added to the Mariners’ 40-man roster just last week. He split time between Double-A Arkansas and Triple-A Tacoma last season.
Rosier was a 12th-round pick in the 2021 amateur draft out of UNC Greensboro. He spent last season at Single-A Modesto.
Frazier got off to a fast start last season with Pittsburgh, batting .