They had two (2) O/O's when I was there not to long ago...pretty sure they are still there...Purple KW and a Gold International.
There are more than two O/O, I talked to one of them at the Eden Terminal my last week of Training. Blue Peterbilt, He said Millis had not given him an increase in pay in ten years, but he was retiring after this year so there was no sense going anywhere else. While I was in Richfield last month, they had a Purple T200 for an Owner/Op with Millis getting a transmission put in. Didn't get to talk to the driver though. I did talk to his mechanic. The old guy has been an O/O for Millis for some time.