The Gunners, along with Tottenham and Everton, were linked with a move for the forward on transfer deadline after he was deemed surplus to requirements at Old Trafford by new manager Louis van Gaal.
And, after bartering over the deal, a transfer worth a reported £16million was finally agreed, with Welbeck signing a long-term deal at the Emirates.
The Man United academy product, 23, scored 20 Premier League goals in 90 appearances across six seasons and has 26 England caps to his name.
