They experienced the most successful period in their history under the management of Bob Paisley , who guided the team to 21 trophies in nine seasons .
The club was one of 22 members of the Premier League when it was formed in 1992 .
club experienced the most successful period in club 's history under the management of Bob Paisley , who guided the team to 21 trophies in nine seasons .
The club was one of 22 members of the Premier League when it was formed in 1992 .