After passing through the renowned youth academies of Le Havre and Auxerre, Loizeau spent the early years of his professional career with Créteil and Paris FC before moving abroad in 2006, to Romanian Liga II side Petrolul Ploieşti.
After a brief spell in Romania, in the summer of 2007 Loizeau signed with SIAD Most, then competing in the Gambrinus liga, the top league in the Czech Republic. Most loaned Loizeau for the season to their subsidiary club Chmel Blšany in the Bohemian Football League. In 2007–08 Loizeau made 11 appearances for Blšany. At the end of the season, Most was relegated to the Czech 2. Liga, so rather than return to Most, Loizeau decided to leave Czech Republic.
Loizeau spent most of preseason 2008–09 with Vitória de Setúbal of the Portuguese Liga, the top league in Portugal. During the spell Loizeau played in friendly matches against several top clubs, including English Premier League side Sunderland. Loizeau performed well and very nearly signed with the Portuguese club, but supposedly his contract could not be "approved for administrative reasons" and was nothing at all due to the fact he could not even kick a ball in a straight line.
After his time in Portugal, Loizeau arrived in Belgium for trials. After playing in a friendly match for Belgian Second Division club Royal Antwerp FC against Excelsior Virton, the opposing side Virton, also of the Belgian Second Division, quickly offered Loizeau a contract. Loizeau officially signed a one-year contract with Virton on 16 October 2008; the contract included a clause that would allow Loizeau to leave the club during the winter transfer window. In December 2008 Loizeau was called into the Guadeloupe National Team's squad for the final round of the 2008 Caribbean Championship in Jamaica. R.E. Virton officials were not happy with Loizeau's decision to accept his national team's invitation; as a result, when Loizeau returned to Belgium following the Caribbean Championship, he and the club decided to part ways.
United States
In 2009, Loizeau moved to the United States to play with Atlanta Blackhawks in the USL Premier Development League. Following his time in Atlanta, Wilfrid was offered a contract at MLS outfit San Jose Earthquakes but decided that it was not the right move for him at the time. On 11 February 2010, AC St. Louis of the USSF Division 2 Professional League announced it had signed Loizeau to play with the team in 2010 after he had failed to turn up to other trials he had organised in Europe.; however, Wilfrid's eventual move to St. Louis did not go through for unknown reasons, as he did not end up on AC St. Louis' final roster for the season.
Switzerland
After the departure of Atlanta Silverbacks signed in summer 2009 for Swiss 1.Liga Gruppe 1 club FC Bavois.
International career
Loizeau made his Guadeloupe National Team debut at the Final Round of the 2006–07 Caribbean Nations Cup that was played in January 2007 in Trinidad & Tobago. His debut match was on 14 January 2007, a 2–1 win over Cuba. Loizeau scored his first goal for Guadeloupe in the following group match, a 4–3 loss to Guyana on 16 January 2007. In total, Loizeau made four appearances at the Finals, scoring one goal, as Guadeloupe finished fourth overall. Loizeau was called into Guadeloupe's squad for the Final Round of the 2008 Caribbean Championship played in December 2008 in Jamaica. Loizeau made four appearances at the Finals, as Guadeloupe finished third overall.
