The Academy product, starting up front, touched home Amad's right-wing cross to hand us a flying start in Suffolk.
It was the fastest goal for any new United boss, in this regard, and the second time he has managed to enter the record books after also firing the maiden effort of Ole Gunnar Solskjaer's tenure. It came five minutes into a thumping 5-0 win at Cardiff City, as the Norwegian initially took interim charge.
Two other Reds have managed this same feat, scoring the first goal for a new manager on two occasions.
The ever-dependable Lou Macari netted for both Dave Sexton and Ron Atkinson, against West Midlands duo Birmingham City and Coventry City respectively.