OnceManchester United's rugged, obsessive and inspirational midfield leader,Roy Keanecontinues to inadvertentlyself-sabotage his aspirations to transition from an all-time great footballer to potentially a successful top-flight manager.A once-in-a-generation footballer,Keane'sruthlessness worked because he possessed cachet as Manchester United captain.In the coaching world, he is atoothlesstiger.Confronting Manchester United'sAston Villa loanee, Tom Cleverley, at his home, perKen Lawrence at The Sun,is Keane'slatest regrettable moment of impulsivity.Keane's ex-boss, Paul Lambert, theAston Villa manager, attempted to diffuse the situation."Roy's a good pal of mine and there's no problem,"Lambert said, perGregg Evans at the Birmingham Mail. "[Cleverley]assured me that thingshadn'thappened in the way theyhave been portrayed."By admitting to being a "good pal" of Keane, it discredits Lambert's testimony since it is natural for him to protect his former No. 2.Keane, who abandoned his role as Aston Villa assistant manager, ceased his working relationship with Cleverley.There was no logical reason forKeane to approachCleverley in such an abrupt manner.DoorsteppingCleverley gives you an insight into the mind ofKeane, who is seemingly out of touch with reality.Here is a probable catalyst that explains Keane's thought process.Chris Wheeler at the Daily Mail obtained insider information from an anonymous source detailingKeane's acerbic style of management, which ostracised him from theAston Villa playing group:The atmosphere was horrible. It went downhill the moment Keane arrived. ...There was so much gloom about the place every time he turned up. When he went, there was just a feeling of euphoria and relief. ... It is understood [Gabriel Agbonlahor] was talking tactics with Lambert when Keane interrupted.Agbonlahor resented the interference and tried to belittle Keane by telling him: 'Excuse me, but I'm talking to the boss!' ...[Fabian Delph], who is said to have taken an instant dislike to Keane, screamed: 'Don't try to f-----g mug me off.' Their relationship never recovered ...Chris Herd is another of the players said to have had a falling out with [Keane].By givingCleverley animpromptuvisit, it lends believability to Wheeler's exclusive for the Daily Mail.You can only surmise the truth is hurtingKeane because this is a further hit tohis credibility.Keane throws his weight around as if he is still dominating in midfield forManchester United, where he played480 times, won aUEFA Champions League title and was a seven-time Premier League winner.Ruling with an iron fist,Keane was the tone-setter whowielded absolute authority duringManchester United'straining sessions, asAndy Goram found out when hepassed the ball toLuke Chadwick.By doing so,Goram rejected a wide-openKeanecuetemper tantrum."I barked back, 'is that how it works here Roy' Everyone has to give the ball to you'',"Goramsaid, per The Sun (h/tThe Scotsman). "The Neville brothers approached me in the changing room and said 'erm goalie, we don't speak to Roy like that'."Suspended from the 1999 Champions League final againstBayern Munich,Keane refused to accept full culpability.Forced into a late challenge, he blamedJesper Blomqvist's under-hit pass."[Keane said]: 'It's your f-----g fault that I'm going to miss the final.'That was the way he worked. Things were never his fault,"Blomqvist said, per the bookMatch of My LifeEuropean Cup Finals (h/tThe Scotsman)."[Sir Alex]Ferguson let Keane go on, because he saw that his outbursts ultimately benefited the team ... eventually [Keane] crossed the line of what was acceptable, and that was when he had to leave the club."Keane has been crossing the line of what is acceptable when it comes to managing players.If you were the owner interviewingKeane for a vacant managerial position, you would ask him: "Have you alienated a dressing room'"Keane,who is honest and forthright to a fault, would answer: "Yes."BeforeAston Villa, a segment ofIpswich Town's playing group were anti-Keane.Pablo Counago condemnedKeane for creating a toxic workplace."Ipswich was like a big family and there was a good atmosphere around the training ground,"Counago said, per TWTD.co.uk (h/tDaniel Taylor at The Guardian). "[Keane]changed that.After the Ipswich job hedidn'tget another job for a while because the other clubs start to know what you are like."Jonathan Walterstuned out wheneverKeane spoke."I respected [Keane]as a player, but maybe he can't get his point across as a manager,"Walters said, per Garry Doyle at the Irish Independent. "At Ipswich, it became personal a few times. ... In my case, his words went in one ear and out the other."Keane'srelentlessness damagedDamien Delaney psychologically, according toCrystal Palace assistant managerKeith Millen."[Delaney's]head had gone. I think he'd had a real tough time with Roy Keane as manager,"Millen said, perMark Ritson at theCroydon Advertiser. "[Delaney]was almost thinking of quitting the game or going abroad to America."Since leavingKeane,Delaney has played in 47 Premier League games forCrystal Palace.Vexed byKeane's non-existentcommunication,Jordan Rhodes has scored a combined 141 goals for Huddersfield Town and Blackburn Rovers post-Keane."My paths haven't crossed with Roy since,"Rhodes said, per The Sun (h/t Sky Sports). "He didn't say anything to me when he released me or give me any reasons [for my exit]."LikeRhodes,Kevin Lisbie suffered as a result ofKeane's coldness."[Keane]sent me out on loan without even seeing me play one game,"Lisbie said, perCarl Marston at the Ipswich Star. "I think he should have spoken to me first. To be honest, I feel like a piece of meat."Collaborating with authorRoddy Doyle,Keane wasintrospective in his autobiography,Second Half, comparing his behaviour at Ipswich Town to that ofSunderland ownerEllis Short."I made the point aboutEllis Short talking to me like I was something on the bottom of his shoe,"Keane said, per his autobiography. "I think I spoke like that to some people atIpswich."Keane, who led Sunderland to the2006-07 Championship title, despised beingtreated condescendingly byShort."It started with a demand to know where I had been the previous day, that [Short]wanted me available at all times,"Keane said, per Paul Hyland at The Herald. "Icouldn'tgive my heart and soul with this fella on my shoulder."It caused irreconcilable damage to his relationship withShort, ultimately leading to Keane'sresignation via text message."I wasn't [Short's] manager.He owed me nothing. He wasn't there when we were promoted. I'd done nothing for him,"Keane said, per his autobiography (h/tMark Douglas atThe Chronicle). "I should have read that script a little bit better. ... [but]I don't like being spoken down to."What ahypocrite.There is an unwarranted social superiority complex from Keane, who routinely verbally rebukes players, expecting them to suck it up, yet he is extremely thin-skinned himself.Keanecannot handle constructive criticism that cuts to the core of his self-worth.This is the background story to why Keane turned into private detective Ed Loy, staking out Cleverley's house, "incorrectly believing him to have leaked information about an alleged training ground [incident at Aston Villa]," per Ian Baker at The Times(subscription required).It overshadows Keanehelping outtheIrish amputee football team, supportingthe Irish guide dogs for the blind and being inside the cancer ward at the bedside of the late Gareth Ian Ablett."Roy has this reputation as a hard man, hard as nails, and detached emotionally,"Ablett said, per his autobiography (h/tPaul Joyce at the Daily Express)."But I have seen another side to him.Every day I was in the hospital, he came to visit. Without fail."DoesKeane want to be reduced to this caricature of a 24/7 tough-guy'If so, he will be a leader with no followers, leaving his managerial career up in the air.Someone linkKeane toMonty Python's "Always Look on the Bright Side of Life."@allanjianga+allanjiangWhen not specified, statistics via WhoScored.com. Click here to read full news..