A United source states the club was aware of the issue but it wasn't a problem when signing the striker.
Spaniard made just nine appearances last season
Welbeck kick-starts England Euro 2016 campaign ahead of Arsenal debut
Manchester United director Sir Bobby Charlton says things will be easy this season without Champions League action.
Sebastian Kehl has revealed that Shinji Kagawa is delighted to leave Manchester United and rejoin Borussia Dortmund.
Mikel Arteta's return to training has handed a major boost to Arsenal.
Ander Herrera and Luke Shaw have returned to training and could be in contention to face QPR at Old Trafford.
Robin van Persie waiting to start training and playing with new signings.
IBTimes UK brings you live coverage of England's start to Group E.
The Moroccan joined the German champions last month.
Mauricio Pochettino failed to sign a striker during the summer.
Dutch legend believes Blind's career development should be blueprint for Holland's youngsters.
The Dutch startet had been expected to leave the club on loan this season.
Andre Gomes joined Valencia earlier this summer
The Dutchman will be 35 for the next competition on Russia.
Sterling can be a "massive" player for England for next 10-15 years says Rooney
De Gea believes striker will prove worth at Real Madrid
Vicente del Bosque says Costa made correct decision pulling out of Macedonia qualifier
The Spaniard says returning to Highbury this season will be a special moment.
The Reds will continue to send youth players out on loan to gain experience
The midfielder is yet to play a game for Chelsea this season.
Rio Ferdinand believes Danny Welbeck's frustration was the reason behind his switch from Manchester United to Arsenal
The 78 year old has been in charge of world football since 1998
French Under-21 international will not give up on replacing Olivier Giroud.
The Brazilian centre-back was heavily linked with a move to Old Trafford earlier in the summer.
Henderson turned ankle during England training session at St Jakob-Park on Sunday
Blues no longer big-spending club says Portuguese boss
The Colombian international's injury history should concern Manchester United
Switzerland face England in the first match of the Euro 2016 qualifier. Find out how to follow the match live in the UK.
Manchester United midfielder Davide Petrucci has left Old Trafford and completed his switch to CFR Cluj.