[1] His 43 victories ranks fifth all time in the history of the Superbike World Championship behind Jonathan Rea, Carl Fogarty, Alvaro Bautista and Troy Bayliss.

[2] Haga ranks fourth behind Troy Corser, Tom Sykes and Jonathan Rea in career World Superbike race starts with 313.

Haga started his racing career by competing in the Japanese Superbike Championship in 1993, riding a Ducati bike.

He was chosen to replace the injured Colin Edwards for the last two races of the season in Sugo, Japan, and Sentul, Indonesia.

He initially received a one-month ban beginning on June 5 and had his points from both South African races deducted.

He joined the Renegade Ducati Koji team and was in contention for the championship until the final round, despite several mechanical failures.

The first race was won by his good friend Yukio Kagayama of Alstare Corona Suzuki and the second by Britain's James Toseland of Winston Ten Kate Honda, who had been his main rival for 2nd place in the championship.

Haga finished 2nd in the riders championship, 2 points behind Toseland - a double win in the final round at Magny-Cours being just not enough.

Haga won seven races during the season, with wins at Valencia, Monza, and Magny-Cours, as well as doubles at the Nurburgring and Vallelunga.

However, this was only good enough for 3rd in the final standings behind (the winless) Corser and Xerox Ducati's title winner, Troy Bayliss.

In 2009, he joined the factory-backed Ducati Xerox Team to replace the retiring Bayliss, winning his first race at Phillip Island, and taking an early championship lead.

Haga signed with the Swan Yamaha British Superbike Team for the 2012 season alongside reigning 2011 BSB champion Tommy Hill.

In Round 8 at Cadwell Park, Haga broke his collarbone in a big high-side during free practice and was ruled out for the weekend.

On 16 September 2013, it was announced that Haga would be returning to BSB with Paul Bird Motorsport riding a Kawasaki ZX-10R for the final 3 rounds of the season.