The 22-year-old made 14 appearances for the Ladbrokes Premiership club.
A statement from the Paisley club read: "St Mirren Football Club can confirm that Matty Willock has left the Buddies and will return to his parent club, Manchester United.
"The club would like to thank Matty for his contributions and wish him well for his future career."
| Team | P | GD | PTS | |
| {{pos_1}} | {{name_1}} | {{play_1}} | {{gd_1}} | {{pts_1}} |
| {{pos_2}} | {{name_2}} | {{play_2}} | {{gd_2}} | {{pts_2}} |
| {{pos_3}} | {{name_3}} | {{play_3}} | {{gd_3}} | {{pts_3}} |
| {{pos_4}} | {{name_4}} | {{play_4}} | {{gd_4}} | {{pts_4}} |
| {{pos_5}} | {{name_5}} | {{play_5}} | {{gd_5}} | {{pts_5}} |
| {{pos_6}} | {{name_6}} | {{play_6}} | {{gd_6}} | {{pts_6}} |
| {{pos_7}} | {{name_7}} | {{play_7}} | {{gd_7}} | {{pts_7}} |
| {{pos_8}} | {{name_8}} | {{play_8}} | {{gd_8}} | {{pts_8}} |
| {{pos_9}} | {{name_9}} | {{play_9}} | {{gd_9}} | {{pts_9}} |
| {{pos_10}} | {{name_10}} | {{play_10}} | {{gd_10}} | {{pts_10}} |
| {{pos_11}} | {{name_11}} | {{play_11}} | {{gd_11}} | {{pts_11}} |
| {{pos_12}} | {{name_12}} | {{play_12}} | {{gd_12}} | {{pts_12}} |
| {{pos_13}} | {{name_13}} | {{play_13}} | {{gd_13}} | {{pts_13}} |
| {{pos_14}} | {{name_14}} | {{play_14}} | {{gd_14}} | {{pts_14}} |
| {{pos_15}} | {{name_15}} | {{play_15}} | {{gd_15}} | {{pts_15}} |
| {{pos_16}} | {{name_16}} | {{play_16}} | {{gd_16}} | {{pts_16}} |
| {{pos_17}} | {{name_17}} | {{play_17}} | {{gd_17}} | {{pts_17}} |
| {{pos_18}} | {{name_18}} | {{play_18}} | {{gd_18}} | {{pts_18}} |
| {{pos_19}} | {{name_19}} | {{play_19}} | {{gd_19}} | {{pts_19}} |
| {{pos_20}} | {{name_20}} | {{play_20}} | {{gd_20}} | {{pts_20}} |
| {{pos_21}} | {{name_21}} | {{play_21}} | {{gd_21}} | {{pts_21}} |
| {{pos_22}} | {{name_22}} | {{play_22}} | {{gd_22}} | {{pts_22}} |
| {{pos_23}} | {{name_23}} | {{play_23}} | {{gd_23}} | {{pts_23}} |
| {{pos_24}} | {{name_24}} | {{play_24}} | {{gd_24}} | {{pts_24}} |
| {{pos_25}} | {{name_25}} | {{play_25}} | {{gd_25}} | {{pts_25}} |
| {{pos_26}} | {{name_26}} | {{play_26}} | {{gd_26}} | {{pts_26}} |
| {{pos_27}} | {{name_27}} | {{play_27}} | {{gd_27}} | {{pts_27}} |
| {{pos_28}} | {{name_28}} | {{play_28}} | {{gd_28}} | {{pts_28}} |
| {{pos_29}} | {{name_29}} | {{play_29}} | {{gd_29}} | {{pts_29}} |
| {{pos_30}} | {{name_30}} | {{play_30}} | {{gd_30}} | {{pts_30}} |
| Team | P | GD | PTS | |
| {{pos_1}} | {{name_1}} | {{play_1}} | {{gd_1}} | {{pts_1}} |
| {{pos_2}} | {{name_2}} | {{play_2}} | {{gd_2}} | {{pts_2}} |
| {{pos_3}} | {{name_3}} | {{play_3}} | {{gd_3}} | {{pts_3}} |
| {{pos_4}} | {{name_4}} | {{play_4}} | {{gd_4}} | {{pts_4}} |
| {{pos_5}} | {{name_5}} | {{play_5}} | {{gd_5}} | {{pts_5}} |
| {{pos_6}} | {{name_6}} | {{play_6}} | {{gd_6}} | {{pts_6}} |
| {{pos_7}} | {{name_7}} | {{play_7}} | {{gd_7}} | {{pts_7}} |
| {{pos_8}} | {{name_8}} | {{play_8}} | {{gd_8}} | {{pts_8}} |
| {{pos_9}} | {{name_9}} | {{play_9}} | {{gd_9}} | {{pts_9}} |
| {{pos_10}} | {{name_10}} | {{play_10}} | {{gd_10}} | {{pts_10}} |
| {{pos_11}} | {{name_11}} | {{play_11}} | {{gd_11}} | {{pts_11}} |
| {{pos_12}} | {{name_12}} | {{play_12}} | {{gd_12}} | {{pts_12}} |
| {{pos_13}} | {{name_13}} | {{play_13}} | {{gd_13}} | {{pts_13}} |
| {{pos_14}} | {{name_14}} | {{play_14}} | {{gd_14}} | {{pts_14}} |
| {{pos_15}} | {{name_15}} | {{play_15}} | {{gd_15}} | {{pts_15}} |
| {{pos_16}} | {{name_16}} | {{play_16}} | {{gd_16}} | {{pts_16}} |
| {{pos_17}} | {{name_17}} | {{play_17}} | {{gd_17}} | {{pts_17}} |
| {{pos_18}} | {{name_18}} | {{play_18}} | {{gd_18}} | {{pts_18}} |
| {{pos_19}} | {{name_19}} | {{play_19}} | {{gd_19}} | {{pts_19}} |
| {{pos_20}} | {{name_20}} | {{play_20}} | {{gd_20}} | {{pts_20}} |
| {{pos_21}} | {{name_21}} | {{play_21}} | {{gd_21}} | {{pts_21}} |
| {{pos_22}} | {{name_22}} | {{play_22}} | {{gd_22}} | {{pts_22}} |
| {{pos_23}} | {{name_23}} | {{play_23}} | {{gd_23}} | {{pts_23}} |
| {{pos_24}} | {{name_24}} | {{play_24}} | {{gd_24}} | {{pts_24}} |
| {{pos_25}} | {{name_25}} | {{play_25}} | {{gd_25}} | {{pts_25}} |
| {{pos_26}} | {{name_26}} | {{play_26}} | {{gd_26}} | {{pts_26}} |
| {{pos_27}} | {{name_27}} | {{play_27}} | {{gd_27}} | {{pts_27}} |
| {{pos_28}} | {{name_28}} | {{play_28}} | {{gd_28}} | {{pts_28}} |
| {{pos_29}} | {{name_29}} | {{play_29}} | {{gd_29}} | {{pts_29}} |
| {{pos_30}} | {{name_30}} | {{play_30}} | {{gd_30}} | {{pts_30}} |
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Liverpool | 19 | 16 | 3 | 0 | 43 | 7 | 36 | 51 |
| 2 | Tottenham HotspurSpurs | 19 | 15 | 0 | 4 | 42 | 18 | 24 | 45 |
| 3 | Manchester CityMan City | 19 | 14 | 2 | 3 | 51 | 15 | 36 | 44 |
| 4 | Chelsea | 19 | 12 | 4 | 3 | 37 | 16 | 21 | 40 |
| 5 | Arsenal | 19 | 11 | 5 | 3 | 41 | 25 | 16 | 38 |
| 6 | Manchester UnitedMan Utd | 19 | 9 | 5 | 5 | 37 | 31 | 6 | 32 |
| 7 | Leicester CityLeicester | 19 | 8 | 4 | 7 | 24 | 22 | 2 | 28 |
| 8 | Everton | 19 | 7 | 6 | 6 | 31 | 29 | 2 | 27 |
| 9 | Watford | 19 | 8 | 3 | 8 | 26 | 27 | -1 | 27 |
| 10 | Wolverhampton WanderersWolves | 19 | 7 | 5 | 7 | 20 | 22 | -2 | 26 |
| 11 | Bournemouth | 19 | 8 | 2 | 9 | 27 | 33 | -6 | 26 |
| 12 | West Ham UnitedWest Ham | 18 | 7 | 3 | 8 | 25 | 27 | -2 | 24 |
| 13 | Brighton & Hove AlbionBrighton | 19 | 6 | 4 | 9 | 21 | 27 | -6 | 22 |
| 14 | Crystal Palace | 19 | 5 | 4 | 10 | 17 | 25 | -8 | 19 |
| 15 | Newcastle UnitedNewcastle | 19 | 4 | 5 | 10 | 14 | 26 | -12 | 17 |
| 16 | Southampton | 18 | 3 | 6 | 9 | 19 | 33 | -14 | 15 |
| 17 | Cardiff CityCardiff | 19 | 4 | 3 | 12 | 18 | 38 | -20 | 15 |
| 18 | Burnley | 19 | 3 | 3 | 13 | 17 | 41 | -24 | 12 |
| 19 | Fulham | 19 | 2 | 5 | 12 | 17 | 43 | -26 | 11 |
| 20 | Huddersfield TownHuddersfield | 19 | 2 | 4 | 13 | 12 | 34 | -22 | 10 |
| > Full Version | |||||||||
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| {{pos_2}} | {{name_2}} | {{play_2}} | {{gd_2}} | {{pts_2}} |
| {{pos_3}} | {{name_3}} | {{play_3}} | {{gd_3}} | {{pts_3}} |
| {{pos_4}} | {{name_4}} | {{play_4}} | {{gd_4}} | {{pts_4}} |
| {{pos_5}} | {{name_5}} | {{play_5}} | {{gd_5}} | {{pts_5}} |
| {{pos_6}} | {{name_6}} | {{play_6}} | {{gd_6}} | {{pts_6}} |
| {{pos_7}} | {{name_7}} | {{play_7}} | {{gd_7}} | {{pts_7}} |
| {{pos_8}} | {{name_8}} | {{play_8}} | {{gd_8}} | {{pts_8}} |
| {{pos_9}} | {{name_9}} | {{play_9}} | {{gd_9}} | {{pts_9}} |
| {{pos_10}} | {{name_10}} | {{play_10}} | {{gd_10}} | {{pts_10}} |
| {{pos_11}} | {{name_11}} | {{play_11}} | {{gd_11}} | {{pts_11}} |
| {{pos_12}} | {{name_12}} | {{play_12}} | {{gd_12}} | {{pts_12}} |
| {{pos_13}} | {{name_13}} | {{play_13}} | {{gd_13}} | {{pts_13}} |
| {{pos_14}} | {{name_14}} | {{play_14}} | {{gd_14}} | {{pts_14}} |
| {{pos_15}} | {{name_15}} | {{play_15}} | {{gd_15}} | {{pts_15}} |
| {{pos_16}} | {{name_16}} | {{play_16}} | {{gd_16}} | {{pts_16}} |
| {{pos_17}} | {{name_17}} | {{play_17}} | {{gd_17}} | {{pts_17}} |
| {{pos_18}} | {{name_18}} | {{play_18}} | {{gd_18}} | {{pts_18}} |
| {{pos_19}} | {{name_19}} | {{play_19}} | {{gd_19}} | {{pts_19}} |
| {{pos_20}} | {{name_20}} | {{play_20}} | {{gd_20}} | {{pts_20}} |
| {{pos_21}} | {{name_21}} | {{play_21}} | {{gd_21}} | {{pts_21}} |
| {{pos_22}} | {{name_22}} | {{play_22}} | {{gd_22}} | {{pts_22}} |
| {{pos_23}} | {{name_23}} | {{play_23}} | {{gd_23}} | {{pts_23}} |
| {{pos_24}} | {{name_24}} | {{play_24}} | {{gd_24}} | {{pts_24}} |
| {{pos_25}} | {{name_25}} | {{play_25}} | {{gd_25}} | {{pts_25}} |
| {{pos_26}} | {{name_26}} | {{play_26}} | {{gd_26}} | {{pts_26}} |
| {{pos_27}} | {{name_27}} | {{play_27}} | {{gd_27}} | {{pts_27}} |
| {{pos_28}} | {{name_28}} | {{play_28}} | {{gd_28}} | {{pts_28}} |
| {{pos_29}} | {{name_29}} | {{play_29}} | {{gd_29}} | {{pts_29}} |
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