In his eight years at the heart of the United midfield, many opposing players felt the full force of a Crerand challenge. But now, as a commentator and pundit for MUTV, it's only the occasional referee, journalist or colleague who gets an earful.
Patrick Timothy Crerand was born in Glasgow, Scotland in 1939. And after six years with Celtic, on the fifth anniversary of the Munich air disaster, he signed for the Reds in 1963. Valued at £56,000 and aged just 23, his commitment and contribution to United would go on to become priceless.
As the unsung hero of the holy trinity, Paddy made over 400 appearances for the club. In his time, he has lifted both the FA Cup and the European cup; he's no stranger to a league title or two either. He has also coached and became an assistant manager under Tommy Docherty.
Paddy has been a regular feature at the Theatre Of Dreams for nearly 47 years, and is as passionate and loyal to the cause now as he was the day he stepped out at Old Trafford.
It was once said that while United had Best, Law and Charlton, an in-form Paddy was the heartbeat of the team.
In the sixties an adage was coined among United fans: "If Pat Crerand plays well, United play well."