His first goal was in the semi-final of the FA Cup against Merseyside rivals Everton at Old Trafford on 27 March 1971 with a dramatic 75th minute volley to clinch a 2-1 comeback.
Hall started the home first leg of that 1973 UEFA Cup Final against Borussia Mönchengladbach, but the game was abandoned after 27 minutes due to a downpour.
Shankly in watching those 27 minutes before the game was abandoned felt the German defence was suspect in the air.
Shankly brought in tall forward John Toshack to the starting line up instead demoting Hall to appearing only as an 83rd-minute substitute for Steve Heighway in a 3–0 win.
[8][9][3][2][6][5][7] He scored Liverpool's opener in the 1973–74 FA Cup 3-1 semi final replay win against Leicester City.
Described by Liverpool as one of Hall's best games, he lined up with Peter Cormack in an all-Scottish born central-midfield pairing.
As goal scorer Kevin Keegan said in the post match interviews, "Brian sort of was going to flick it and I shouted, "leave it".
On 17 September 1974 Hall was part of the Liverpool side which recorded their 11–0 record European result against Norwegian side Strømsgodset in a Cup Winners Cup First Round First Leg tie at Anfield, of the 10 outfield players who played in the match he was the only one not to get on the score sheet.
"[2] In his obituary in The Independent he is described, "Hall tended to be an unobtrusive performer not often given to spectacular interventions, although his adroitly hooked volley which beat Everton in an FA Cup semi-final at Old Trafford in 1971 was a glorious exception.
His forte was foraging ceaselessly for the ball then passing it with the minimum of fuss to the nearest red shirt in time-honoured Liverpool fashion.
He kept moves flowing and could invariably be relied on to support the man in possession, embodying the messianic Shankly's devotion to the creed of the collective."
The same obituary further described him as, "skilful, wirily resilient... making light of a slight deficiency in pace by his ceaseless industry.