PITTSFORD, N.Y. — The Justice Department’s antitrust inquiry into men’s professional golf has included interviews with players, including the major tournament winners Phil Mickelson, Bryson DeChambeau and Sergio García, as the authorities examine whether the PGA Tour sought to manipulate the sport’s labor market.
The department, which has been conducting its investigation since at least last summer, has also explored the specter of collusion in the Official World Golf Ranking and the tight-knit relationships between the leaders of the PGA Tour and the distinct organizations that stage the Masters, the P.G.A. Championship and the U.S. Open.