Marcus is a smart coach, and there's been no word about any injuries for Pat recently.
After some of the Africans made a strong move, he went off the back of that group and looked like he was hurting. Not sure what happened, hopefully he did just cruise home for the rest of the race. The broadcast came back after another commercial break and he'd gone from being around 100m behind to being lapped.
Pat's been running very well for over a year, going back to last spring/summer to qualify for Rio. This was only his third 10,000 on a track, the last time being at Payton Jordan (?) and previously for the Australian National Championship meet. This track season, he's been on form as well. I'm sure he is ready for some kind of extended break.
Again, I hope he's fine. I really hope that he's in good enough shape to race the 5000 well.