Although the Phillies are the only active major league professional baseball team in Philadelphia, other professional baseball teams play in the Delaware Valley. The Reading Fightin Phils are the Double-A affiliate of the Philadelphia Phillies. The club was established in 1967, and plays in the Eastern League. Notable alumni of the Fightin Phils include Mike Schmidt, Ryne Sandberg, and Jimmy Rollins. The Wilmington Blue Rocks are a Kansas City Royals affiliate that play in Wilmington, Delaware. Three other Phillies affiliates play in Pennsylvania or New Jersey: the Triple-A Lehigh Valley IronPigs play in Allentown, Pennsylvania, the Class A Lakewood BlueClaws play in Lakewood Township, New Jersey, and the Class A Williamsport Crosscutters play in Williamsport, Pennsylvania. Another minor league team, the Trenton Thunder, have played in Trenton, New Jersey since 1994; the team is currently the Double-A affiliate of the Yankees.