They probably still are, but coming from Washington to Philly, they probably took Amtrak, and again up to NY. They tend to do that along the NE Corridor. We will know for sure, though, when they travel to Cleveland the night of July 2nd.
Saw in the paper that the Yankees hazed there rookies on this trip to Toronto. From boston.com
From the owner’s manual
The Yankees put a creative spin on what often becomes a needlessly humiliating tradition of hazing a team’s rookies in baseball. Instead of going the conventional route of forcing the kids to wear women’s clothing and parading them through the airport, the Yanks came up with matching wigs, white turtlenecks, blue blazers, and sunglasses in parody of Yankees owner George Steinbrenner. The effect was hilarious, and players like Cabrera happily posed for pictures with family and friends as the team boarded the buses taking staff and players to the airport and a flight to Toronto.
At the time of that post, it hadn’t departed yet, and I have no idea why it was on one and not the other. It showed up here once it departed, as you can see here.