Since moving back to Bournemouth, however, the 28-year-old forward has already enjoyed a 3-0 win over the Canaries.
He subsequently took to Twitter to react to the 'great result' and also sent a message to fellow front man Benik Afobe.
Indeed, the other striker Bournemouth have signed this January - from Championship outfit Wolves - scored his first goal for the club against Norwich.
Many have seen the signings of Grabban and Afobe as big statements of intent from the Cherries. Far from the little underdogs anymore, Eddie Howe's men appear very serious about spending their way to Premier League safety.
Great result today big congrats to @Afobe_ on his first goal for the club!— Lewis Grabban (@grabbs22) January 16, 2016
It remains to be seen whether Norwich regret selling Grabban to their relegation rivals, while it also remains to be seen whether those previously linked with Afobe didn't sign him instead of Bournemouth.
For now, though, it's the Cherries with the upper hand. Alex Neil said he couldn't believe how poor Norwich were - and that doesn't bode well ahead of a very important run-in indeed.