"I'm not going to discuss what went into the investigation," Watson said.
Solomon could not be immediately reached for comment.
Winters' crew is in Detroit for a series against the Twins that wraps up Wednesday night. He was replaced by Triple-A umpire Scott Barry. It is not known if Barry will remain with the crew when it moves to Milwaukee on Thursday for a four-game season-ending series between the Padres and Brewers.
Sandy Alderson, the Padres' chief executive officer who oversaw umpires when he was an MLB executive vice president, said he didn't want to directly speak about the decision.
"We're pleased MLB investigated the matter," Alderson said when reached by telephone in San Diego, "but I have no comment on the decision."
The Padres, who trail the D-backs by two games in the National League West and lead the Phillies and Rockies by a game in the NL Wild Card race, close out a three-game series at San Francisco on Wednesday night. They will move on to Milwaukee where they open a four-game series on Thursday night against a Brewers team that's trying to catch the Cubs for first place in the NL Central.
Barry M. Bloom is a national reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.