EUGENE, Ore. (AP) - Oregon coach Chip Kelly says the Ducks have cooperated fully with the NCAA investigation into the school's use of recruiting services, and he isn't particularly surprised that the process has taken so long.

He also says that no potential recruits have mentioned the probe.

Kelly spoke after practice Thursday, addressing an Yahoo Sports report the day before that Oregon is likely headed toward a hearing with the NCAA committee on possible infractions because the two sides couldn't come to an agreement on appropriate sanctions. Yahoo cited two unidentified sources.

The inquiry is the result of reports that surfaced last year concerning payments Oregon made to recruiting services, including a $25,000 payment to Willie Lyles and Houston-based Complete Scouting Services in 2010. Lyles had a relationship with a player who committed to Oregon.

The NCAA doesn't comment on investigations.