Completely miss-kicked a clearance in the first few minutes but the resulting corner came to nothing. Then completely miss-kicked a second clearance, this time on the edge of his area, and then hand-balled it, but again got away with no punishment when he really could have been sent off. Did make one fine save to deny Rafael at 0-0.
Was rooted to the spot as his man, Jones, headed United into the lead. The free kick was largely his fault, too, after he dallied when trying to deal with Rafael. Made a good block to deny Marouane Fellaini.
Made a few headed clearances as United focused on set pieces. Caught napping as Rooney nipped in for 2-0.
Held his position well and made a few headed clearances but did not do too much else of note before being withdrawn with what looked like an injury.
Shrugged Rooney off the ball and burst forward as he tried to drive his team forward in the first half. Good defending set pieces. Lunged in for Danny Welbeck's goal, giving the striker time to pick his spot.
Wasteful with his good early opportunities, particularly from the wide areas.
Cleared Marouane Fellaini's deflected effort off the line, but could not cope with Rooney and Mata as United scored its second.
Put an effort over the crossbar with his shoulder from close range and then went off injured, after being fouled by Fellaini.
Brought down Rafael for the free kick which led to Manchester United's opener, but he was let down by Liam Ridgewell, in truth. Almost scored an own goal and saw Wayne Rooney land on his knee. Was quiet when in possession, too.
Got the ball in advanced areas in the early exchanges but failed to make the most of it. Carved open the visitors after halftime with a neat one-two, but could not find a finish. Faded late on.
Worried the visitors with his presence, power and pace, but his influence waned as the match wore on. Is West Brom's most dangerous player at present but is often left down by the service.
Had little to do in the main. Made a couple of routine saves and that was that for the Spaniard.
Got forward whenever possible, at the behest of his manager, but did not create too much in truth.
Gave the ball away in the back on a couple of occasions early but scored the opening goal with a powerful header. Put in an absolute cruncher, fairly, on Victor Anichebe.
Did well to thwart Victor Anichebe following a powerful run from halfway. Let Morgan Amalfitano in at one stage, but looked assured.
His firm header was a good chance but was well saved by Ben Foster. Picked out Wayne Rooney beautifully to make it 2-0. Made a great block on Saido Berahino.
Did what he has done regularly this season: played it simple and did not utilize his expansive passing ability. Not great, not terrible, just Michael Carrick.
Clumsy would be the best word to sum up his first half, if not his United career so far. A few loose touches early and a raking challenge that left stud marks on Claudio Yacob's thigh. Had a half-volley blocked after the break. Won some headers and played his part in United's third.
Put in a superb ball for Rafael, who was denied by Foster and the crossbar. Sliced a volley horribly after halftime. Not one of his better days. Substituted.
Did very little in the first half. Tried to make up for that shortly after the break but his volley from 35 yards out was never troubling Foster. Headed in the second goal after helping create the opportunity with some impressive link-up play. Set up Welbeck for 3-0.
Picked out Januzaj with a clever ball in the early stages, and linked up well with the youngster whenever they were in the same areas. One delightful piece of skill by the touchline. Linked up well with Rooney to help create the second goal. Showed great defensive awareness by denying Brunt a tap-in.
R. van Persie
Struggled for service early but showed his teammates how it's done with a pinpoint free kick for Jones' opener. Booked for a bad foul on Almafitano and was lucky to stay on after lunging at Reid. Substituted.