Leyland said "everybody was fine" and there was "full attendance."
"It is good to give them a workout today to get them loosened up a little bit and make sure they get back in town and there's no issues with flying and stuff," Leyland said.
The Tigers spent the workout time giving the outfielders fly balls off the bat and having the infielders do fungo work.
Leyland said pitcher Rick Porcello threw live to hitters for about 10 minutes.
The only players excused from the workout were All-Star participants Prince Fielder, Miguel Cabrera and Justin Verlander, as flights out of Kansas City suffered significant delays.
Leyland said he paid unusually close attention to this year's All-Star festivities, hosting a "low-key" gathering with a few close friends and family members.
Neither Fielder's victory in the Home Run Derby nor Verlander's five-run first inning came as a shock to the Tigers' skipper.
"Prince put on a show, obviously," Leyland said. "So did Justin. That didn't surprise me. I'm just glad he's back and healthy. I was worried about it because I knew he was going to be amped up and try to throw 100, and he did. that's OK. He threw it and he's fine, he's back and healthy. That's all I care about."