By Chris Rosvoglou Shortly after it was announced that Memphis has received a notice of allegations, the program lost one of its top assistant coaches. According to Stadium insider Jeff Goodman, Memphis assistant Cody Toppert is finalizing a deal to join Matt McMahon’s staff at LSU. “Memphis assistant Cody Toppert is finalizing a deal to go to LSU, source told Stadium. Nice first step for Matt McMahon on his staff. Toppert is an ex-NBA guy who also has recruiting ties – especially in the south,” Goodman tweeted on Saturday afternoon. Toppert, 39, has been an assistant coach for Memphis since 2…