Oklahoma running back Joe Mixon is not on the invite list to participate in the NFL scouting combine, sources confirmed to ESPN's Adam Caplan on Friday.

Mixon, who was suspended for the 2014 season for punching a woman, is among the top five running backs in the draft based on talent, according to ESPN NFL Draft analyst Mel Kiper Jr.

Baylor wide receiver Ishmael Zamora, who was suspended for three games last season after video surfaced of him beating his dog, also is not on the invite list, Caplan confirmed.

The exclusion of both players was first reported by USA Today.

It is unclear if the players' off-the-field troubles were factors in their omission from the list.

In 2016, the NFL announced a policy that college players with convictions for domestic violence, sexual assault or weapons offenses would not be invited to the combine. But that doesn't necessarily apply to Mixon or Zamora.