This former Manchester United striker has amassed plenty of managerial experience having spent over fifteen years as a manager in charge of several different clubs.
Lou had a distinguished playing career winning three Scottish league titles and two Scottish Cups with Celtic in addition to the F.A. Cup winner's medal he earned at United in 1977.
His managerial career began at Swindon where he led the Robins to two successive promotions before moving to London to take charge at West Ham in 1989. An unsuccessful spell at Upton Park was followed by a move to Birmingham before Lou went to Stoke for the first of two spells in charge of the Potteries' side.
His time at Stoke was split by a brief spell in charge of the club where he made his name as a player, Celtic. Unfortunately, his time at Parkhead was cut short and he returned to the Victoria Ground to take the reins back from fellow Scot Joe Jordan.
Macari's second term at Stoke began brightly as they reached the First Division play-off final but they were beaten by Leicester and could not repeat their form in the following seasons, dropping back down to Division Two.
Brian Little took over from Macari who made regular appearances commenting on televised football, something he has continued to do.
Lou joined Huddersfield as assistant manager to Steve Bruce in June 1999, making him the obvious choice to take over following Steve's departure after a disappointing start to the 2000/2001 season. Lou then invited his ex-Manchester United and Stoke City colleague Joe Jordan to join him on the management team at the McAlpine Stadium.
The Terriers spent the majority of the season fighting against relegation to the Nationwide League Second Division, and they eventually succumbed to the fate of the drop alongside QPR and Tranmere.
The Huddersfield boss faced a challenge to try and lift the team out of the third tier of English football back into Division One.
Despite seeing 11 players leave the club in 2001-02, forcing Lou to throw in several untried youngsters, the Terriers boss managed to take his team into the play-offs, where they were unfortunate to lose to Brentford in the semi-finals.
Macari then parted company with the club in June 2002.