By contrast, Manchester rivals United never got the same bang for their bucks and appeared to pay over the top to snatch Chilean forward Alexis Sanchez from under City's noses in the same window.
Remained an attacking threat, but didn't prove to be enough.
Despite the win, West Brom remain bottom on 24 points with four games left to play.
The Reds reacted quickly as they came close to opening the scoreline in the 19th minute as Juan Mata released Romelu Lukaku in the box, however, the Belgian's shot was saved by Ben Foster. Not his usual self. He will have enjoyed the 19th hole.
"We've won the league for you, Man City, Man City", West Brom's fans chanted after the final whistle. His poor headed mistake while defending the corner went straight to Rodriguez, who scored the stadium-quieting winner.
This was the fifth season in which the Premier League title was decided at Old Trafford - more than any other ground in the competition.
"This title was not the last-minute miracle of 2012, or the last-day drama of 2014 but rather a serene glide to glory". Of their five remaining matches, no team is currently higher than 13th in the table.
"It's one of the best by far".
Two shots, both on target. United would end up winning 3-2 to postpone the celebrations till another day.
The Championship - hectic and relentless - has seen off more experienced managers but Moore deserves the opportunity, especially after masterminding an unlikely victory at Old Trafford.
"I am looking at the next game". But he still let on too many errors, one, in particular, that could have ended in a goal.
By beating Tottenham Hotspur on Saturday metropolis, who rebounded from also a exit and also your United loss at the hands of Liverpool, have 87 issues together with five games.
'I NEEDED TO CHANGE THE DYNAMIC'"In the first half, I felt that I had to bring one player with more dynamic and more of a run and more of a player that touched the ball and searched for spaces, so I had to make a decision about one midfield player out to play Jesse Lingard".
A consistent threat throughout the game, his specialty stood in his perseverance at the front.
With the exception of the chance for Lukaku - and a penalty appeal when Ander Herrera was caught by Craig Dawson - it was a soporific first half for the home fans.