Rochelle replacement prop Lekso Kaulashvili picked up a yellow card and Edinburgh replacement Duncan Weir kicked the resulting penalty to bring Edinburgh back to within four points.
However, the Scottish outfit could not complete the comeback, with two penalties from experienced stand-off Brock James seeing La Rochelle home.
Edinburgh’s star man Watson bemoaned the “stupid errors” that led to defeat. The 25-year-old said: “We didn’t perform well in the first half at all.
“We managed to get things back to 14-7, but then we did not exit properly and they sc...