The Sunderland youth team shot-stopper made six appearances for the Black Cats’ under-18s side last season and has impressed while training with Crawley in the last week.
Manager Richie Barker: “Taff (Williams) has very good knowledge of young goalkeepers and has spoken very highly of him from the work they did last week.
“There are going to be a lot of goalkeepers available in the summer and he has a head start on them, although he is a long way from home.”
The last time Swansea came to Wearside ...
2011/12 SUNDERLAND 2 SWANSEA 0
Stephane Sessegnon and Craig Gardner brought Swansea back down to earth as Sunderland returned to winning ways.
The Benin international fired the Black Cats ahead in stunning fashion with 14 minutes gone, and substitute Gardner made sure of the three points with an equally adept finish five minutes from time.
Martin O'Neill's men were forced to defend for long periods, particularly before the break, as the visitors attempted to build on last weekend's Barclays Premier League victory over Arsenal.
However, they were unable to make the pressure count when they were in the ascendancy and the home side saw out time relatively comfortably to the delight of the bulk of a crowd of 36,904.
Sunderland owner and chairman Ellis Short has written of the "tremendous impact" O'Neill has had since his arrival on Wearside in December, and the curve remains very much upward with his side having lost just two of the nine games they have played under the Ulsterman.
The Black Cats ran out determined to avenge last weekend's 1-0 reverse at Chelsea, and they started in promising fashion.
Despite the difficult conditions on a cold, blustery Wearside afternoon, they did not allow Swansea to settle into their passing game.
They might have been ahead as early as the fifth minute when Sebastian Larsson met Kieran Richardson's left-wing cross with a powerfully-struck volley at the far post, but saw his effort come back off the upright.
O'Neill was dealt a blow when he was forced to replace striker Nicklas Bendtner with teenager Connor Wickham after the Dane had been accidentally caught in the face by Angel Rangel's boot.
But Sunderland might have fallen behind within seconds of the newcomer's arrival when Gylfi Sigurdsson, not for the first-time, slipped the ball in behind full-back Richardson for Nathan Dyer to deliver a low cross.
Danny Graham failed to make contact in front of goal, but the ball ran to Scott Sinclair behind the far post and he skied his effort well over.
The visitors were made to pay within seconds when Sessegnon cut inside from the left and after exchanging passes with James McClean, curled a deft right-foot shot across keeper Michel Vorm and high into the top corner.
David Vaughan blazed over from 22 yards five minutes later as the home side threatened to kill the game off, but as the initial storm abated, the visitors belatedly found their feet.
Icelandic international Sigurdsson and Joe Allen started to get to grips with the midfield battle and as Sunderland repeatedly surrendered possession far too cheaply, it was the Welsh side who started to dominate.
Graham was unable to direct Sigurdsson's 26th-minute cross at goal, but keeper Simon Mignolet was grateful to see the midfielder's dipping effort from distance drop just wide five minutes later.
Sigurdsson saw a 39th-minute shot blocked by Lee Cattermole and scuffed a second straight at Mignolet seconds later with Sunderland pinned back deep inside their own half.
O'Neill was clearly unhappy with his side's performance as the half drew to a close, and the whistle arrived as something of a relief.
His side returned in far more positive mood to put the visitors under pressure, and they almost broke through again with 51 minutes gone.
Sessegnon's enterprising run allowed him to feed Larsson on the right and when the Swede sent in an inviting cross, the former only just failed to connect with an overhead kick.
The ball broke to Wickham, whose effort was blocked, as was Vaughan's follow-up, and Swansea eventually managed to scramble clear.
But once again, the visitors responded and after Sigurdsson had wasted a 55th-minute free-kick, he forced a good save from Mignolet with a second three minutes later.
Loan signing Josh McEachran arrived as a 66th-minute replacement for Sigurdsson with his side labouring in the search for an equaliser.
They came close to falling further behind 15 minutes from time when Sessegnon dived to meet McClean's cross with a firm header, but the ball flew just wide.
Wayne Routledge and Gardner arrived as 78th-minute replacements for Leon Britton and David Vaughan as Brendan Rodgers looked for greater creativity and O'Neill attempted to tighten things up.
Wickham came close to cementing the victory when he fired just wide from the loose ball after getting the better of an aerial challenge with Ashley Williams, but Gardner wrapped up the points with a fine volley five minutes from time.
SUNDERLAND: Mignolet, Bardsley, O'Shea, Brown, Richardson, Larsson (Elmohamady 89), Cattermole, Vaughan (Gardner 78), McClean, Bendtner (Wickham 12), Sessegnon.
Subs Not Used: Westwood, Turner, Ji, Meyler.
SWANSEA: Vorm, Rangel, Caulker, Williams, Taylor, Dyer, Britton (Routledge 78), Sinclair, Allen, Sigurdsson (McEachran 66), Graham.
Subs Not Used: Tremmel, Monk, Moore, Agustien, Richards.
Att: 36,904
SUNDERLAND v SWANSEA
2012/2013 Sat 01 Sep Swansea City 2 - 2 Sunderland Premier League
2011/2012 Sat 21 Jan Sunderland 2 - 0 Swansea City Premier League
Sat 27 Aug Swansea City 0 - 0 Sunderland Premier League
1982/1983 Sat 19 Mar Sunderland 1 - 1 Swansea City First Division
Sat 06 Nov Swansea City 3 - 0 Sunderland First Division
1981/1982 Sat 20 Feb Sunderland 0 - 1 Swansea City First Division
Sat 26 Sep Swansea City 2 - 0 Sunderland First Division
1979/1980 Sat 22 Mar Sunderland 1 - 1 Swansea City Second Division
Sat 10 Nov Swansea City 3 - 1 Sunderland Second Division
1963/1964 Sat 04 Apr Sunderland 1 - 0 Swansea Tn. Second Division
Sat 23 Nov Swansea Tn. 1 - 2 Sunderland Second Division
Wed 25 Sep Swansea Tn. 3 - 1 Sunderland League Cup
1962/1963 Sat 11 May Swansea Tn. 3 - 4 Sunderland Second Division
Sat 01 Sep Sunderland 3 - 1 Swansea Tn. Second Division
1961/1962 Sat 28 Apr Swansea Tn. 1 - 1 Sunderland Second Division
Sat 09 Dec Sunderland 7 - 2 Swansea Tn. Second Division
1960/1961 Sat 17 Dec Swansea Tn. 3 - 3 Sunderland Second Division
Sat 20 Aug Sunderland 2 - 1 Swansea Tn. Second Division
1959/1960 Sat 16 Jan Sunderland 4 - 0 Swansea Tn. Second Division
Sat 05 Sep Swansea Tn. 1 - 2 Sunderland Second Division
1958/1959 Sat 31 Jan Sunderland 2 - 1 Swansea Tn. Second Division
Sat 13 Sep Swansea Tn. 5 - 0 Sunderland Second Division
1954/1955 Wed 23 Feb Sunderland 1 - 0 Swansea Tn. F.A. Cup
Sat 19 Feb Swansea Tn. 2 - 2 Sunderland F.A. Cup
1936/1937 Sat 20 Feb Sunderland 3 - 0 Swansea Tn. F.A. Cup
Sunderland Fixtures
Tuesday January 29 19:45 Sunderland v Swansea City
Saturday February 2 15:00 Reading v Sunderland
Saturday February 9 15:00 Sunderland v Arsenal
Saturday February 23 15:00 West Brom Sunderland
Saturday March 2 15:00 Sunderland v Fulham
Saturday March 9 15:00 QPR v Sunderland