Lock Romana Graham was also yellow-carded but his indiscretion did not cost La Rochelle as they defeated Grenoble 33-16.
Luke McAlister scored a try for Toulouse in their 27-3 win over Oyonnax, who now prop up the table. The Kiwis there - among them No 8 Viliami Ma'afu, props Soane Tonga'uiha and Stan Wright, wing Fetu'u Vainikolo and lock Leon Power - might just be feeling the pinch.
In the Guinness PRO12, Mils Muliaina finally ran out at fullback for his Italian club Zebre, but they were beaten 39-22 by Ospreys, for whom former New Zealand Under 20s and Highlanders prop Ma'afu Fia entered the fray off the bench.
Scarlets confirmed No 1 position on the log after edging Treviso 22-20 away from home with Regan King and Hadleigh Parkes combining in midfield. Second five Sam Christie scored a try for Treviso, but to no avail.
Nick Williams' Ulster beat Phil Burleigh and Mike Coman's Edinburgh 14-7, while Connacht missed a chance to go top, falling 20-16 at Cardiff Blues, who included centre Rey Lee-Lo and lock Jarrad Hoeata.
The Glasgow-Leinster clash was postponed.
In England's Aviva Premiership, Saracens continued on their merry, unbeaten way, former Taranaki No 8 Samuela Vunisa scoring a try in their 38-3 thumping of Newcastle Falcons. Nili Latu was at No 8 for the Falcons, while former Tonga, Blues and Northland halfback Sonatane Takalua featured off the pine.
The star Kiwi turn saw a hat-trick of tries by No 8 Thomas Waldrom as the Exeter Chiefs upset Wasps 41-27 in Coventry. Jimmy Gopperth kicked five goals for Wasps, while wing Frank Halai again dotted down.
Northampton Saints, with George Pisi against at centre, upset Bath 13-11 at The Rec.
Fullback Telusa Veainu was once more among the tries as the Leicester Tigers beat Bryce Heem's Worcester Warriors 29-20. Five goals by Nick Evans in Harlequins' 38-7 win helped keep London Irish rooted to the bottom of the table, while Willi Heinz, John Afoa and Jeremy Thrush all helped Gloucester to a 23-19 win over Sale Sharks.
The European Champions Cup and Challenge Cup resume with round three this weekend. Dan Carter should make his long-awaited debut for Racing-Metro against Northampton Saints at Colombes on Saturday. Carter may get to come up against his old Crusaders teammates, halfback Kahn Fotuali'i and lock Michael Paterson.