Yesterday Herald Sport outlined six of the best Scottish transfers, January or otherwise, made in the Scottish game. Now it is the time for a dirty half dozen which went down in history for the wrong reasons. Injury, fall-outs, you name it, here are six signings didn't so much provide bang for their club's bucks, but instead exploded in manager's faces.

1. Rafael Scheidt (Botafogo to Celtic, £4.8m)

£4.8m for ten appearances. Roughly the same again if you calculate the accumulation of this Brazilian international centre half's £20,000 a week pay cheques until the day when the Home Office decreed that he was no longer eligible for a work permit and he moved to Atletico Mineiro in his homeland. The name says it all when it comes to this infamous Brazilian arrival - Celtic tried, but failed, to christen him plain old Rafael instead - who was signed during the John Barnes era on the strength of one spliced-together videotape and approximately no scouting missions. Perhaps Martin O'Neill, with typically black humour, summed it up best. Having given him a chance, only to see him run ragged, in a pre-season match with Bray Wanderers, O'Neill had told him: “I like footballers who are not like you.”

2. Joey Barton (Burnley to Rangers, free transfer)

It seemed like a good idea at the time. At least to somebody anyway. To say the Scouser was an enigma when he arrived in Glasgow last summer was an understatement. While there had been much to admire about Barton's performances in a Burnley jersey the season previously, a glimpse at this no nonsense midfielder's autobiograpy No Nonsense revealed that Sean Dyche was pretty much the only manager during his entire career who he parted with on amicable terms. This time his decline was quicker than anyone could have predicted. Having said in a radio interview that Scott Brown wasn't in the "same league" as him, he signed off after a 5-1 Old Firm defeat and a row with Andy Halliday and manager Mark Waburton. All there was left were days, weeks and months of betting probes, disciplinary action and wrangling over a pay off.

3. Paul Bernard (Oldham to Aberdeen, £1m)

What could possibly go wrong with this one? Bernard, born in Edinburgh, but raised in Manchester, was a fully-fledged Scotland international by the time Aberdeen decided to make him Scotland's only non-Old Firm £1m man. He had come to fame with Oldham, scoring the equaliser on the last day they booked their first promotion to the top flight for 70 years, and with manager Roy Aitken's budget boosted by an Aberdeen share issue, surely was ready to kick on now he had some international duty under his belt. While he did feature as Aberdeen beat Dundee to claim the 1995 League Cup, his signing would eventually become notable only as a byword for wastefulness and unfulfilled potential. Thirty appearances in his first season at Aberdeen were followed by just 40 or so in the next three seasons, before moves to Barnsley, Plymouth, St Johnstone and Drogheda United. He never played for Scotland again.

4. Derk Boerrigter (Ajax to Celtic, £3m)

By the end of Neil Lennon's time at Celtic, the Northern Irishman had grown famously wary of 'projects'. The Parkhead side speculated to accumulate during John Park's era as head of recruitment, but for every Virgil van Dijk or Victor Wanyama there was never too much of a wait for a Morten Rasmussen or Mo Bangura. Boerrigter should have been one of the less risky ones when he arrived from Ajax in 2013 for a fee which was reported as £3m. This was a man with two stints at Ajax under his belt, playing 47 times in his second period there, including a Champions League goal at the Santiago Bernabeu. He also came from Oldenzaal, the home town of Jan Vennegoor of Hesselink. Sadly, a reputation for being a habitue of the treatment room also followed him about, though, and that was where he tended to be found. In all, he would score one goal in just over 500 minutes of first-team football at Celtic before the club cut its losses, as he approached two years without an appearance.

5. Mirsad Bešlija (Genk to Hearts, £850,000)

A revolving door was in operation at Tynecastle and Riccarton during the Vladimir Romanov era, as a bewildering array of players from the Eastern bloc made cameo appearances at the club. Mirsad Bešlija, a Bosnian international who arrived from Genk, was perhaps the case par excellence. The club's record sum at the princely sum of £850,000, Beslija made just nine appearances for the Tynecastle first team, none of which will live long in the memory. The most notable thing about the entire affair was a lengthy wrangle over the inclusion of agents fees in the deal which ended with Romanov stumping up for the full amount only after Genk pressed for a Uefa transfer embargo.

6. Walter Rojas (San Lorenzo to Dundee United, £200,000)

Years before Claudio Caniggia ever slummed it at Dens Park, Jim McLean had looked to the Argentinian market - with noticeably less satisfactory results. There were differences of opinion as to whether United ever got their money back for the deal, but their recruitment of a long-haired 20-year-old winger blessed with blistering pace from Buenos Aires outfit San Lorenzo never quite lived up to the hype surrounding the deal. Months passed with no sight of him, before he finally made a rather underwhelming reserve team appearance in a match against Aberdeen. It turns out the club were rather mis-sold in the deal: Rojas was a reserve team player at San Lorenzo who had only graced the club four times.