The team's trainers and pitching coach Steve McCatty were on hand to make sure Lannan was able to throw his full repertoire of pitches -- curveball, slider, fastball and changeup -- which he did.
Lannan, who missed a start because of elbow discomfort, is good to go against the Rockies on Thursday night.
"Everything was good. I was locating everything. They were looking to see if anything bothered me," Lannan said. "When I missed a spot, I came back, I fixed it. There was no pain or anything. I was able to throw the pitches. I'm ready for Thursday."
Though it is expected to be cold in Colorado, Lannan doesn't think he will be on an innings limit.
"I don't even know. I don't think so," he said. "I would hope they would let me go, depending on how the game plays out. I may be OK because of the cold weather, but we'll see."
In addition, Lannan is now wearing a compression sleeve, which he says makes his arm feels better when he throws.
"I'm going to start wearing it because it feels better," he said. "It's something the trainers ordered. I tried it. It feels good, so I'm going to wear it."