INDIANAPOLIS | Assistant Rob Senderoff resigned Tuesday amid a telephone recruiting scandal that already has cost Indiana one basketball scholarship and coach Kelvin Sampson a $500,000 pay raise.

The NCAA is still conducting its own investigation, which could lead to further sanctions.

"It's a very strong message," athletic director Rick Greenspan said of the internal investigation and report to the NCAA. "It's been delivered by voice, by written word, by action. If you look at the self-imposed sanctions and the corrective actions, an astute person would look at these as very significant ... all the way down the line."

The report, which does not accuse Sampson of any direct NCAA violations, details more than 100 impermissible recruiting calls, most of them by Senderoff. At least 10 of them were three-way calls that Sampson had been patched into, and another eight included incoming calls that couldn't be identified.

Greenspan wouldn't speculate what action the NCAA would take or the timetable for reaching a decision. He said Andrean grad Dan Dakich, a former Indiana player and assistant coach and former head coach at Bowling Green, would likely take Senderoff's spot on Sampson's staff.

Dakich was hired as IU director of basketball operations in June and would be subject to the same restrictions the university imposed on Senderoff, Greenspan said.