Wisniewski started playing rugby at a youth level for Gaillac.[2] In 2000, he left for Castres,[2][3] but only stayed for one year, joining the Toulouse youth academy in 2001 at age 16.[2][3] He stayed there for four years, even making one appearance for the senior team during the 2004–05 season.[2][4] He signed his first professional contract for Aix-en-Provence,[2] who were relegated from Pro D2toFédérale 1 at the end of the season, forcing Wisniewski to leave. He signed for Castres, but the arrival of New-Zealander Cameron McIntyre moved him to third-choice fly-half,[2][3] and he was asked to leave during the winter break by his president.[3] Wisniewski joined Colomiers in January, when the club was already doomed to relegation, but the six months spent there turned out to be a very positive personal experience for him,[3] and his form caught the eye of ambitious Racing Métro manager Pierre Berbizier, who signed him the following summer.[3][5] He overtook All-Black legend Andrew Mehrtens as first-choice fly-half in his first season for the club,[2] and has remained first choice since, despite the arrival of such big names as François Steyn and Juan Martín Hernández. He was an integral part of Racing's firstHeineken Cup campaign,[5] that ended in the group stage, behind Leinster and Clermont, but in front of Saracens.
