Heat oven to 350°F. In small cup, combine butter and Worcestershire sauce; mix well. Place roast in shallow roasting pan. Brush butter mixture over roast. Press peppercorns over top of roast; sprinkle with thyme.
Bake at 350°F. for 1 1/2 to 2 hours or until meat thermometer registers 135°F. for medium-rare or 150°F. for medium doneness.
Remove roast from oven. Cover with tent of foil. Let stand 10 to 15 minutes before carving.