"He's perhaps best known in retrospect for his time as a midfielder, but he started off his career as a center-back and that background made him a very tough holding midfielder. Frank was very strong on the ball. He was extremely powerful in the air, but he was also pretty quick and could place pinpoint passes - hence his later deployment in midfield. He could play as part of the zonal system or one-on-one equally effectively. He'd be well suites to the modern game."
"His move to Milan in 1988 was the making of him - Arrigo Sacchi transformed him into an agressieve, world-class holding midfielder who could score goals, too. Dunga, Desailly, Keane and Vieira all performed that role brilliantly, but Frank is the best holding player ever."
"A good defensive midfield player with vision and strength. I played with him at club and international level for many years and he was one of the best. He controlled the midfield with his presence, strength and technique. He would help start attacks, but make sure the other team couldn't get at the defence. Provided a great balance to any team he played in."