Walker tossed 36 pitches in his first game action of the spring Tuesday, Anthony DiComo of MLB.com reports.
The right-hander breezed through the first inning before running into trouble in the second, but his workload was the most important takeaway. Walker has enough time to get stretched out to about 90 pitches before Opening Day, and he's expected to slot into the No. 4 spot in the Mets' rotation.